Former Vice President Joe Biden Joe BidenMomentum growing among Republicans for Supreme Court vote before Election Day Trump expects to nominate woman to replace Ginsburg next week Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral MORE is leading the 2020 pack in congressional endorsements with just over a week to go before the nomination race officially kicks off with the Iowa caucuses.

Biden currently has 42 endorsements from House and Senate Democrats, more than twice as many as his closest presidential primary competitors, including Sens. Elizabeth Warren Elizabeth WarrenBiden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon MORE (D-Mass.) and Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE (I-Vt.).

Biden's popularity in the congressional endorsement contest allows him to underscore his electability argument by touting his longstanding relationships and experience on Capitol Hill, where he served six terms as a senator from Delaware.

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Congressional endorsements are seen as an important measure in presidential elections, allowing candidates to lean on lawmakers to act as campaign surrogates, especially if they hail from key primary or caucus states.

They can also shore up a candidate's standing with key Democratic constituencies. Biden and his allies are touting how his endorsements hail from various corners of the Democratic caucuses on Capitol Hill, presenting that as evidence that he's backed by a diverse coalition that can win nationally.

Fifteen of Biden’s 41 endorsements are from members of the Congressional Black Caucus (CBC), along with five members of the Congressional Hispanic Caucus (CHC) and nine from competitive swing districts.

Biden rolled out four new endorsements from lawmakers in the CBC last week after the Martin Luther King Jr. holiday, including two who had previously endorsed Sen. Kamala Harris Kamala HarrisHarris honors Ginsburg, visits Supreme Court The Hill's Campaign Report: Trump and Biden vie for Minnesota | Early voting begins in four states | Blue state GOP governors back Susan Collins Kamala Harris: Black Americans have been 'disproportionately harmed' by Trump MORE (D-Calif.) before she dropped out of the race in early December.

Polls have shown Biden leading consistently among African-American Democratic voters, including in South Carolina, where the former vice president is leading in the polls.

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Rep. Frederica Wilson Frederica Patricia WilsonHarris calls it 'outrageous' Trump downplayed coronavirus House passes bill establishing commission to study racial disparities affecting Black men, boys Florida county official apologizes for social media post invoking Hitler MORE (D-Fla.), a CBC member who had backed Harris, said she shifted her support to Biden because she considers him the most viable and experienced candidate to take on President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE.

“While former Vice President Biden initially stumbled on the campaign trail, his debate performances have steadily improved and he has consistently been at the top of the polls,” Wilson told The Hill. “In addition, he has the respect of world leaders with whom he engaged as vice president and, if elected, could bypass the whole getting-to-know you phase and immediately begin rebuilding our nation’s global standing.”

“The only person I believe in this lineup of candidates who can stop [Trump] from getting a second term is Biden,” Wilson also said.

Meanwhile, Rep. Tony Cárdenas (D-Calif.), who chairs the Congressional Hispanic Caucus’s political arm, said that Biden’s more moderate stances compared to Sanders or Warren and his record on issues like gun safety and health care resonate with lawmakers.

Latino voters are set to play a critical role in early-state Nevada in late February as well as in Texas and California, two Super Tuesday primary states.

“His record dwarfs everybody else's,” Cárdenas said. “He's not an extremist. And I think the average American is not an extremist.”

And while most senators have declined to endorse anyone, Biden has secured five endorsements from the chamber -- more than any other Democratic presidential candidate.

Meanwhile, Warren has 13 congressional endorsements, drawing heavily from progressive lawmakers as well as from her home state.

Warren locked down endorsements from six members of her Massachusetts delegation, including Rep. Ayanna Pressley Ayanna PressleySan Francisco considers changing local voting age to 16 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 'Markeyverse' of online fans helps take down a Kennedy MORE, except for three who have yet to endorse anyone and a fourth, Rep. Stephen Lynch Stephen Francis LynchOvernight Defense: Dems divided on length of stopgap spending measure | Afghan envoy agrees to testify before House panel | Trump leans into foreign policy in campaign's final stretch Afghan envoy agrees to testify before House panel after subpoena threat Overnight Defense: Trump's battle with Pentagon poses risks in November | Lawmakers launch Fort Hood probe | Military members can't opt out of tax deferral MORE, who has backed Biden.

She also secured an endorsement this past week from Rep. Jamie Raskin Jamin (Jamie) Ben RaskinShakespeare Theatre Company goes virtual for 'Will on the Hill...or Won't They?' Trump payroll-tax deferral for federal workers sparks backlash Congress must enact a plan to keep government workers safe MORE (D-Md.), a progressive and constitutional expert who has been front and center in House Democrats’ investigations of the Trump administration.

“Elizabeth Warren has the chance to recapture the moral center of America and make it the political center of our party,” Raskin said in a video posted to his Twitter account.

Only one Democrat representing a swing district, freshman Rep. Katie Porter (Calif.), has endorsed Warren.

Sanders has 8 congressional endorsements, including three members of the so-called "squad" -- Reps. Alexandria Ocasio-Cortez Alexandria Ocasio-CortezLawmakers fear voter backlash over failure to reach COVID-19 relief deal Why Democrats must confront extreme left wing incitement to violence The Hill Interview: Jerry Brown on climate disasters, COVID-19 and Biden's 'Rooseveltian moment' MORE (N.Y.), Ilhan Omar Ilhan OmarDemocrats scramble on COVID-19 relief amid division, Trump surprise Larry Kudlow defends response to coronavirus: Trump 'led wisely' The Hill's Morning Report - Sponsored by National Industries for the Blind - Woodward book revelations rock Washington MORE (Minn.) and Rashida Tlaib Rashida Harbi TlaibGeorge Conway: 'Trump is like a practical joke that got out of hand' Pelosi endorses Kennedy in Massachusetts Senate primary challenge The Democratic Party platform represents our big tent MORE (Mich.).

The endorsements were considered a coup for the Vermont senator, as other candidates had also been courting the three first-term lawmakers.

Ocasio-Cortez, who has emerged as a progressive star, is set to play a key role in campaigning for Sanders in Iowa at a time when the senator is stuck in Washington because of Trump's impeachment trial, including rallying for him on Friday.

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Sanders has also locked down support from many of the top progressive leaders in Congress who don’t believe Biden’s positions go far enough. The Progressive Caucus co-chairs, Reps. Mark Pocan Mark William PocanClark rolls out endorsements in assistant Speaker race Hillicon Valley: Pentagon reaffirms decision to award JEDI contract to Microsoft | Schiff asks officials for briefing on election security threats Democrats explore new ways to resurrect election security briefings MORE (Wis.) and Pramila Jayapal Pramila JayapalDHS opens probe into allegations at Georgia ICE facility Progressive Caucus co-chair: Whistleblower complaint raises questions about 'entire detention system' Buttigieg, former officials added to Biden's transition team MORE (Wash.), each endorsed Sanders within the last ten days.

Jayapal told CBS News after endorsing Sanders last weekend that the U.S. risked “another Donald Trump down the road” if the U.S. doesn’t elect a more progressive candidate.

"Even if it is a Democratic president, if we don't address these issues we will end up with another Donald Trump down the road," Jayapal said. "Because people are suffering. And our job has to be to fix that suffering."

Sanders also has endorsements from the other two members of the Vermont congressional delegation: Sen. Patrick Leahy Patrick Joseph LeahyBattle over timing complicates Democratic shutdown strategy Hillicon Valley: Russia 'amplifying' concerns around mail-in voting to undermine election | Facebook and Twitter take steps to limit Trump remarks on voting | Facebook to block political ads ahead of election Top Democrats press Trump to sanction Russian individuals over 2020 election interference efforts MORE and Rep. Peter Welch Peter Francis WelchShakespeare Theatre Company goes virtual for 'Will on the Hill...or Won't They?' Vermont Rep. Peter Welch easily wins primary Vermont has a chance to show how bipartisanship can tackle systemic racism MORE.

Among other presidential contenders, former South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBipartisan praise pours in after Ginsburg's death Bogeymen of the far left deserve a place in any Biden administration Overnight Defense: Woodward book causes new firestorm | Book says Trump lashed out at generals, told Woodward about secret weapons system | US withdrawing thousands of troops from Iraq MORE has six congressional endorsements, including one from 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 (D-N.H.), who is serving as a national campaign co-chair.

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He also secured an endorsement from Rep. Anthony Brown Anthony Gregory BrownPelosi seeks to put pressure on GOP in COVID-19 relief battle Democrats demand Esper explicitly ban Confederate flag and allow Pride, Native Nations flags Trump tweets key GOP lawmaker has committed to not changing Confederate base names MORE (D-Md.), a CBC member, a critical one given persistent concerns about Buttigieg's lack of support among African American voters.

Sen. Amy Klobuchar Amy KlobucharThe Hill's Morning Report - Sponsored by The Air Line Pilots Association - White House moves closer to Pelosi on virus relief bill EPA delivers win for ethanol industry angered by waivers to refiners It's time for newspapers to stop endorsing presidential candidates MORE (Minn.), who like Biden has run on a more moderate platform, so far has five endorsements, all hailing from her Minnesota delegation: Sen. Tina Smith Tina Flint SmithThe Hill's Campaign Report: Trump and Biden vie for Minnesota | Early voting begins in four states | Blue state GOP governors back Susan Collins GOP Senate candidate says Trump, Republicans will surprise in Minnesota Biden promises Democratic senators help in battleground states MORE and Reps. Betty McCollum Betty Louise McCollumOVERNIGHT ENERGY: Trump extends Florida offshore drilling pause, expands it to Georgia, South Carolina | Democrats probe Park Service involvement in GOP convention | Sanders attacks 'corporate welfare' to coal industry included in relief package Democrats probe Park Service involvement in GOP convention Overnight Energy: EPA chief outlines vision for agency under 'Trump's second term' | Agency sued over decision not to regulate chemical linked to fetal brain damage MORE, Collin Peterson Collin Clark PetersonThe Hill's Campaign Report: 19 years since 9/11 | Dem rival to Marjorie Taylor Greene drops out | Collin Peterson faces fight of his career | Court delivers blow to ex-felon voting rights in Florida Peterson faces fight of his career in deep-red Minnesota district Democrats for Life urge DNC to change party platform on abortion MORE, Angie Craig and Dean Phillips Dean PhillipsShakespeare Theatre Company goes virtual for 'Will on the Hill...or Won't They?' US Chamber of Commerce set to endorse 23 House freshman Democrats Minnesota Rep. Dean Phillips wins primary MORE.

Former New York City mayor Michael Bloomberg Michael BloombergTop Democratic super PAC launches Florida ad blitz after Bloomberg donation The Hill's 12:30 Report - Presented by Facebook - Latest with the COVID-19 relief bill negotiations The Memo: 2020 is all about winning Florida MORE has also picked up endorsements from four House Democrats in recent days, and former Rep. 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 (Md.) has two endorsements despite his consistently low standing in the polls.

But four Democratic presidential candidates -- Sen. Michael Bennet Michael Farrand BennetOVERNIGHT ENERGY: House Democrats tee up vote on climate-focused energy bill next week | EPA reappoints controversial leader to air quality advisory committee | Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' Senate Democrats demand White House fire controversial head of public lands agency Next crisis, keep people working and give them raises MORE (Colo.), 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), Tom Steyer Tom SteyerTV ads favored Biden 2-1 in past month Inslee calls Biden climate plan 'perfect for the moment' OVERNIGHT ENERGY: Trump administration finalizes plan to open up Alaska wildlife refuge to drilling | California finalizes fuel efficiency deal with five automakers, undercutting Trump | Democrats use vulnerable GOP senators to get rare win on environment MORE and Andrew Yang Andrew YangDoctor who allegedly assaulted Evelyn Yang arrested on federal charges The Hill's Campaign Report: Biden weighs in on police shootings | Who's moderating the debates | Trump trails in post-convention polls Buttigieg launches his own podcast MORE -- have yet to earn a congressional endorsement.