Democrats in the crowded presidential race are scrambling for key endorsements in the early primary states, beginning with House Majority Whip James Clyburn (D-S.C.), who will host his South Carolina fish fry on Friday.

Clyburn is one of a handful of influential Democrats whose endorsements could boost candidates battling for attention and support in the first four primary and caucus states that will get to vote ahead of Super Tuesday.

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Here’s a who’s who of the most important remaining coveted endorsements in Iowa, New Hampshire, South Carolina and Nevada.

IOWA

Former Sen. Tom Harkin Thomas (Tom) Richard HarkinThe Memo: Trump attacks on Harris risk backfiring Ernst challenges Greenfield to six debates in Iowa Senate race Biden unveils disability rights plan: 'Your voices must be heard' MORE

Former Sen. Tom Harkin was a major fixture in Iowa politics for more than 30 years, serving as the state’s senator and congressman.

Seventeen Democrats, including former Vice President Joe Biden Joe BidenPelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Hillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Fox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio MORE, the current front-runner, are on tap to attend the Polk County Democrats Steak Fry, which Harkin hosted for decades prior to 2014 under a different name.

He endorsed former Secretary of State Hillary Clinton Hillary Diane Rodham ClintonFox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio Trump, Biden court Black business owners in final election sprint The power of incumbency: How Trump is using the Oval Office to win reelection MORE in 2015. It’s unclear whether he will pick somebody this year because of his nonpartisan role at the Harkin Institute for Public Policy and Citizen Engagement at Iowa’s Drake University.

Fred Hubbell

While Fred Hubbell narrowly lost his gubernatorial bid to Gov. Kim Reynolds (R) in 2018, he has built an enviable fundraising infrastructure in the state.

It is not yet known whether he will endorse in 2020. Biden campaigned with Hubbell during his gubernatorial run in 2018.

Rep. David Loebsack

Loebsack, who has served seven terms, won reelection in 2016 even as his district went for Trump.

Though he will retire in 2020, his endorsement is sought after. Loebsack hosted a fundraising event during the 2018 midterm elections, which was attended by three Democratic presidential hopefuls: South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBillionaire who donated to Trump in 2016 donates to Biden The Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November Buttigieg stands in as Pence for Harris's debate practice MORE, Rep. Eric Swalwell Eric Michael SwalwellSwalwell calls for creation of presidential crimes commission to investigate Trump when he leaves office 'This already exists': Democrats seize on potential Trump executive order on preexisting conditions Swalwell: Barr has taken Michael Cohen's job as Trump's fixer MORE (Calif.) and Rep. Tulsi Gabbard Tulsi GabbardRepublicans call on DOJ to investigate Netflix over 'Cuties' film Hispanic Caucus campaign arm endorses slate of non-Hispanic candidates Gabbard says she 'was not invited to participate in any way' in Democratic convention MORE (Hawaii).

J.D. Scholten

The former Democratic congressional candidate came close to unseating longtime Rep. Steve King Steven (Steve) Arnold KingTrump, Biden deadlocked in Iowa: poll GOP leader: 'There is no place for QAnon in the Republican Party' Loomer win creates bigger problem for House GOP MORE (R) during the 2018 midterms.

He has also proven himself to be a valuable fundraiser. His campaign raised more than $900,000 in the week before the election, fueled by more than 30,000 individual donors.

Former Agriculture Secretary Tom Vilsack Thomas James VilsackUSDA: Farm-to-school programs help schools serve healthier meals OVERNIGHT MONEY: House poised to pass debt-ceiling bill MORE

Vilsack served as governor of the Hawkeye State from 1999 to 2007 before former President Obama appointed him to lead the Department of Agriculture.

He was the first member of Obama’s Cabinet to endorse Clinton in 2016. This year he warned Democrats to not underestimate President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE.

The Des Moines Register’s editorial board

The Des Moines Register has become a national source for all political news coming out of the Hawkeye State.

The paper’s editorial board endorsed Clinton ahead of the 2016 Iowa caucuses and again for the general election.

Iowa Asian and Latino Coalition

The Iowa Asian and Latino Coalition has become a primary destination for 2020 Democratic contenders headed to the state.

The group has been visited by the likes of Buttigieg, Montana Gov. Steve Bullock Steve BullockMcConnell locks down key GOP votes in Supreme Court fight Senate Democrats demand White House fire controversial head of public lands agency Pence seeks to boost Daines in critical Montana Senate race MORE, New York City Mayor Bill de Blasio Bill de BlasioOVERNIGHT ENERGY: California seeks to sell only electric cars by 2035 | EPA threatens to close New York City office after Trump threats to 'anarchist' cities | House energy package sparks criticism from left and right EPA threatens to close New York City office after Trump threats to 'anarchist' cities New Year's Eve in Times Square to be largely virtual amid pandemic MORE, Sen. Kamala Harris Kamala HarrisHundreds of lawyers from nation's oldest African American sorority join effort to fight voter suppression Biden picks up endorsement from progressive climate group 350 Action 3 reasons why Biden is misreading the politics of court packing MORE (Calif.) and author Marianne Williamson Marianne WilliamsonMarianne Williamson discusses speaking at People's Party Convention Fewer people watched opening night of Democratic convention compared to 2016 Marianne Williamson: Democratic convention 'like binge watching a Marriott commercial' MORE.

The group told The Hill they plan to make a formal endorsement in August.

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NEW HAMPSHIRE

Concord Mayor Jim Bouley

Bouley was elected to a sixth term as the mayor of New Hampshire’s capital in 2017.

The mayor joined numerous other mayors across the country, including de Blasio, in endorsing Clinton ahead of the New Hampshire primary in the last presidential election.

Manchester Mayor Joyce Craig

Craig made history in 2017 when she became the first woman elected Manchester mayor, ending 12 years of Republican control in the city.

Democratic presidential hopeful John Delaney John DelaneyCoronavirus Report: The Hill's Steve Clemons interviews Rep. Rodney Davis Eurasia Group founder Ian Bremmer says Trump right on China but wrong on WHO; CDC issues new guidance for large gatherings The Hill's Coronavirus Report: Kansas City Mayor Quinton Lucas says country needs to rethink what 'policing' means; US cases surpass 2 million with no end to pandemic in sight MORE, a former Democratic congressman from Maryland, has ties to Craig, having campaigned with her during her mayoral bid in 2017.

State Sen. Lou D’Allesandro

D’Allesandro has represented New Hampshire’s 20th District in the state Senate since 1998. Prior to his time in the legislature, he served in the state’s House of Representatives from 1996 to 1998.

New Hampshire Public Radio reported last year that D’Allesandro considers himself a political “kingmaker” in the state.

D’Allesandro told the Daily Beast that he has met with seven Democratic presidential candidates so far.

Nashua Mayor Jim Donchess

Donchess was elected mayor of Nashua in 2015 after originally stepping down from the post in 1992.

The mayor endorsed Clinton ahead of the state’s 2016 primary and has already met with Buttigieg and de Blasio.

Dudley Dudley

A longtime New Hampshire Democratic activist, Dudley has a lengthy history of making presidential endorsements, especially of insurgent primary candidates.

She endorsed Sen. Bernie Sanders Bernie SandersThe Hill's Campaign Report: Trump faces backlash after not committing to peaceful transition of power Bernie Sanders: 'This is an election between Donald Trump and democracy' The Hill's 12:30 Report: Trump stokes fears over November election outcome MORE (I-Vt.) over Clinton in 2016 and former Sen. Paul Tsongas (D-Mass.) in 1992. Dudley also launched the 1980 Draft Kennedy campaign, urging then-Sen. Ted Kennedy (D-Mass.) to challenge President Carter.

Dudley endorsed Obama in 2008. She told the Concord Monitor in March that she had not yet made a decision on who to endorse in the 2020 primary.

Sen. Maggie Hassan Margaret (Maggie) HassanDemocrats step up hardball tactics as Supreme Court fight heats up Congress needs to prioritize government digital service delivery Senate Democrats demand answers on migrant child trafficking during pandemic MORE

Hassan won election to the Senate in 2016 by defeating incumbent Sen. Kelly Ayotte Kelly Ann AyotteBottom line Bottom line Bottom Line MORE (R) after serving as governor of New Hampshire for four years.

She endorsed Clinton in 2016. It remains unclear whether she will endorse anybody ahead of her state’s primary.

Hassan’s fellow Democratic senator from New Hampshire, Jeanne Shaheen Cynthia (Jeanne) Jeanne ShaheenSenate Democrats introduce bill to sanction Russians over Taliban bounties Trump-backed candidate wins NH GOP Senate primary to take on Shaheen Democratic senator urges Trump to respond to Russian aggression MORE, has ruled out endorsing any of the Democratic candidates.

Rep. Ann Kuster Ann McLane KusterPelosi seeks to put pressure on GOP in COVID-19 relief battle Clark rolls out endorsements in assistant Speaker race Pelosi: House will stay in session until agreement is reached on coronavirus relief MORE

Kuster has been in Congress since 2013 after ousting Rep. Charles Bass (R).

The congresswoman, who endorsed Clinton during the 2016 presidential election, has an extensive history in New Hampshire campaign politics.

She was a member of the state’s steering committees for then-Sen. John Kerry John Forbes KerryThe Memo: Warning signs flash for Trump on debates Divided country, divided church TV ads favored Biden 2-1 in past month MORE’s (D) 2004 presidential bid, and then for Obama in his first presidential run.

State Speaker Steve Shurtleff

Shurtleff has served in the New Hampshire state House since 2004 and has been the House majority and minority leader.

Shurtleff said he received calls from Biden, Sen. Elizabeth Warren Elizabeth WarrenHillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns On The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline Democratic senators ask inspector general to investigate IRS use of location tracking service MORE (D-Mass.) and Sen. Cory Booker Cory Anthony Booker3 reasons why Biden is misreading the politics of court packing Bipartisan praise pours in after Ginsburg's death DHS opens probe into allegations at Georgia ICE facility MORE (D-N.J.) after he was elected Speaker.

SOUTH CAROLINA

Columbia Mayor Steve Benjamin

Benjamin made history in 2010 when he became the first African American elected mayor in Columbia.

Benjamin said he plans to make a formal endorsement later this year, according to McClatchy. He supported Clinton in 2016.

Rep. James Clyburn

Clyburn has long been an influential figure in Palmetto State politics, especially when it comes to connecting with South Carolina’s sought-after African American vote.

Though the South Carolinian has said he will not make an endorsement in the state’s Democratic primary, state Rep. Bakari Sellers (D) told McClatchy that he believes Clyburn “is tacitly endorsing” Biden.

Rep. Joe Cunningham Joseph CunninghamKate Schroder in Ohio among Democratic challengers squelching GOP hopes for the House Warning signs flash for Lindsey Graham in South Carolina Trump asked Chamber of Commerce to reconsider Democratic endorsements: report MORE

Cunningham narrowly defeated Republican Katie Arrington in 2018, becoming the first Democratic congressman to represent South Carolina’s 1st District since 1981.

An endorsement from the congressman would be seen as important in the deep-red state.

Former Gov. Jim Hodges

Hodges has a long history in South Carolina Democratic politics, having served as governor from 1999 to 2003, and in the state House of Representatives.

He has backed longshot candidates before, including former NATO Commander Wesley Clark in 2004, and he even signed a petition supporting Stephen Colbert Stephen Tyrone ColbertColbert implores Pelosi to update 'weaponry' in SCOTUS fight: 'Trump has a literal heat ray' The Hill's Morning Report - Sponsored by Facebook - Washington on edge amid SCOTUS vacancy Juan Williams: Democrats need to bury their divisions MORE’s satirical run in 2008, arguing the comedian was bringing “a sense of levity to politics that’s needed.”

But he endorsed Obama in 2008 and then Clinton in the last presidential election.

Carol and Don Fowler

The importance of the power couple in the state was made clear after The Post and Courier reported that their home has been graced by Democratic hopefuls including Sens. Kirsten Gillibrand Kirsten GillibrandSunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Suburban moms are going to decide the 2020 election Jon Stewart urges Congress to help veterans exposed to burn pits MORE (D-N.Y.) and Amy Klobuchar Amy Klobuchar3 reasons why Biden is misreading the politics of court packing Social media platforms put muscle into National Voter Registration Day Battle lines drawn on precedent in Supreme Court fight MORE (D-Minn.), as well as de Blasio.

Don Fowler served as the chairman of the state’s Democratic Party from 1971 to 1980, and later served as chairman of the Democratic National Committee from 1995 to 1997. Carol Fowler led South Carolina’s Democratic Party from 2007 to 2011.

Don backed Clinton in the 2008 Democratic primary, while Carol threw her support behind Obama.

NEVADA

Former Attorney General Frankie Sue Del Papa

Del Papa made history twice in Nevada — winning election as the state’s first female secretary of state in 1986 and the first female attorney general of the state in 1990.

While she retired in 2002, she has been active in Nevada Democratic presidential politics.

She worked as the co-chairwoman for Clinton’s presidential campaign in Nevada in 2008, according to the Las Vegas Sun, and supported her candidacy again in 2016.

Rep. Steven Horsford Steven Alexander HorsfordThe robbing of a wildlife refuge in Nevada Rep. Steven Horsford wins Democratic House primary in Nevada Overnight Defense: Army now willing to rename bases named after Confederates | Dems demand answers on 'unfathomable' nuke testing discussions | Pentagon confirms death of north African al Qaeda leader MORE

Horsford made history in 2013 when he became the first African American to represent the Silver State in Congress.

He was defeated by a Republican challenger in 2014, though he regained his seat in 2018.

Before his time on Capitol Hill, Horsford served in the state Senate from 2005 to 2013. He was the first African American to be majority leader in the state.

Former Gov. Bob Miller

Miller is the longest-serving governor in Nevada’s history, holding the post from 1989 to 1999, and was the last Democrat to hold the post until Gov. Steve Sisolak was elected in 2018.

Miller backed Clinton in 2008 and 2016.

Gov. Steve Sisolak

Sisolak took office as governor of Nevada as part of the state’s blue wave in 2018.

Sisolak has long ties to the state’s organized labor groups, a relationship that helped him defeat the Republican candidate, Attorney General Adam Laxalt, in 2018.

Before serving as governor, Sisolak served as the chair of the Clarke County Commission, which includes the Las Vegas Strip as part of its jurisdiction.

Biden campaigned for Sisolak and current Nevada Attorney General Aaron Ford during the 2018 campaign.

Rep. Dina Titus Alice (Dina) Costandina TitusShakespeare Theatre Company goes virtual for 'Will on the Hill...or Won't They?' Safe, responsible casino gaming supports state economies at crucial time Biden to tear into Trump over coronavirus, school reopenings in Delaware remarks MORE

Titus has been active in Nevada politics since 1988 when she was first elected to the Nevada state Senate, where she served as minority leader from 1993 to 2008.

She was first elected to Congress in 2008 but lost her 2010 reelection bid to represent the state’s 3rd District. She came back to the House in 2013 after switching to Nevada’s 1st District due to redistricting.

Titus immediately endorsed Clinton when she launched her presidential campaign in April of 2015.

The Culinary Workers Union

Democratic presidential hopefuls have already begun to court the Culinary Union, which boasts a membership of 60,000.

The group is seen as one of the state’s most influential unions, stretching into Nevada’s vast hospitality and service industry.

While the union did not endorse Clinton or Sanders in the 2016 primary, it did throw its weight behind Obama in 2008.

The union’s former political director, state Sen. Yvanna Cancela (D), endorsed Biden in April.

NOT INCLUDED: Sens. Catherine Cortez-Masto and Jacky Rosen Jacklyn (Jacky) Sheryl RosenSenators introduce bipartisan bill to help women, minorities get STEM jobs Hillicon Valley: Election officials prepare for new Russian interference battle | 'Markeyverse' of online fans helps take down a Kennedy | GOP senators unveil bill to update tech liability protections Google, Apple, eBay to meet virtually with lawmakers for tech group's annual fly-in MORE and former Senate Majority Leader Harry Reid Harry Mason ReidThe Supreme Court vacancy — yet another congressional food fight Trump seeks to turn around campaign with Supreme Court fight On The Trail: Battle over Ginsburg replacement threatens to break Senate MORE.

All three Nevada politicians have made clear they will not endorse a candidate until after the state’s caucuses.