Establishment Democrats are consolidating behind former Vice President Joe Biden Joe BidenThe Memo: Warning signs flash for Trump on debates Senate Republicans signal openness to working with Biden National postal mail handlers union endorses Biden MORE after his decisive South Carolina victory in their effort to block liberal front-runner Sen. Bernie Sanders Bernie SandersSenate Republicans signal openness to working with Biden Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll Schumer, Sanders call for Senate panel to address election security MORE (I-Vt.) from clinching the Democratic nomination.

Two of Biden’s competitors in the moderate lane — former South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBogeymen 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 A socially and environmentally just way to fight climate change MORE and Sen. Amy Klobuchar Amy KlobucharEPA delivers win for ethanol industry angered by waivers to refiners It's time for newspapers to stop endorsing presidential candidates Biden marks anniversary of the Violence Against Women Act, knocks Trump and McConnell MORE (D-Minn.) — dropped out of the race following Saturday’s primary in South Carolina and endorsed Biden on Monday evening.

The former White House hopefuls flew to Dallas on Monday, to appear on stage with Biden just hours before voters in Texas and 13 other states cast their ballots on Super Tuesday. A third former 2020 contender, former Texas Rep. Beto O'Rourke Beto O'RourkeJimmy Carter says his son smoked pot with Willie Nelson on White House roof O'Rourke endorses Kennedy for Senate: 'A champion for the values we're most proud of' 2020 Democrats do convention Zoom call MORE, also joined the Dallas rally and told the crowd he will be casting his ballot for Biden.

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Another big boost came from former Senate Majority Leader Harry Reid Harry Mason ReidSenate Republicans signal openness to working with Biden Mellman: The likely voter sham Bottom line MORE (D-Nev.), a key congressional ally when former President Obama and Biden were in the White House.

“Democrats need a candidate who can assemble the largest, most diverse coalition possible to defeat Trump and lead our country following the trauma of Trump’s presidency. That candidate is Joe Biden,” Reid said in a statement Monday.

While the Buttigieg and Klobuchar endorsements were the biggest gets for Biden, he won other endorsements in recent days from other high-profile politicians and power brokers from Super Tuesday states and beyond.

Over the weekend, Biden hit the campaign trail in southern Virginia, a Super Tuesday state, with Terry McAuliffe and Sen. Tim Kaine Timothy (Tim) Michael KaineThe Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep Catholic group launches .7M campaign against Biden targeting swing-state voters GOP senator to quarantine after coronavirus exposure MORE (D-Va.), who both served as governor of the state and as chairman of the Democratic National Committee (DNC). Biden also picked up support from Rep. Bobby Scott Robert (Bobby) Cortez ScottHouse passes bill to allow private lawsuits against public schools for discriminatory practices Pelosi: House will stay in session until agreement is reached on coronavirus relief This week: House returns for pre-election sprint MORE — a member of the Congressional Black Caucus and chairman of the House Education and Labor Committee — and two centrist freshmen who flipped GOP seats in 2018, Reps. Elaine Luria Elaine Goodman LuriaUS Chamber of Commerce set to endorse 23 House freshman Democrats House panel votes against curtailing Insurrection Act powers after heated debate Republican Scott Taylor wins Virginia primary, to face Elaine Luria in rematch MORE (D-Va.) and Jennifer Wexton Jennifer Lynn WextonThe Hill's Campaign Report: Trump's rally risk | Biden ramps up legal team | Biden hits Trump over climate policy Trump campaign knocks Biden event: 'All they could manage is a virtual event' Republicans face worsening outlook in battle for House MORE (D-Va.).

Rep. Don Beyer (D-Va.), the first lawmaker to back Buttigieg, threw his support behind Biden, too.

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A number of establishment and moderate Democrats have warned in recent days that a Sanders nomination would lead to a down-ballot disaster. House Republicans are already painting vulnerable Democrats as radical left-wingers, tying them to Sanders, a self-described democratic socialist.

“Some candidates are calling for a revolution. Well, you know what? We already had a revolution 244 years ago, and it ended 30 miles from here. We don’t need a revolution, we need Joe Biden in the White House,” McAuliffe said at a campaign event in Norfolk, taking a blatant swipe at Sanders.

In delegate-rich California, progressive freshman Rep. Gil Cisneros Gilbert (Gil) Ray CisnerosMORE, who backed Sanders for president in 2016, also jumped on board the Biden bus, as did former Sen. Barbara Boxer Barbara Levy BoxerThe Hill's Morning Report - Presented by Facebook - Biden, Harris launch Trump offensive in first joint appearance Bottom line Polls show big bounce to Biden ahead of Super Tuesday MORE, a Senate colleague of Biden’s for 15 years.

“Joe has been knocked down. Hard,” she said. “He always gets up.”

Other women who endorsed Biden after South Carolina included freshman Rep. Veronica Escobar Veronica EscobarRaces heat up for House leadership posts Ahead of a coronavirus vaccine, Mexico's drug pricing to have far-reaching impacts on Americans Hispanic Caucus asks for Department of Labor meeting on COVID in meatpacking plants MORE (D-Texas), a rising star in the party; Sen. Tammy Duckworth Ladda (Tammy) Tammy DuckworthBiden courts veterans amid fallout from Trump military controversies John Fogerty: 'Confounding' that Trump campaign played 'Fortunate Son' at rally Senate Democrats introduce bill to sanction Russians over Taliban bounties MORE (D-Ill.), a decorated Iraq War veteran who lost both her legs in combat; Rep. Marcia Fudge Marcia Louise FudgeThis week: House returns for pre-election sprint House to tackle funding, marijuana in September Honoring John Lewis's voting rights legacy MORE (D-Ohio), a former Black Caucus chairwoman; former Sen. Blanche Lincoln (D-Ark.); Vicki Kennedy, the widow of former Sen. Ted Kennedy (D-Mass.); Susan Rice, Obama’s former national security adviser; and Rep. Debbie Wasserman Schultz Deborah (Debbie) Wasserman SchultzFlorida Democrat introduces bill to recognize Puerto Rico statehood referendum Five things to watch at the Democratic National Convention Michelle Obama wishes Barack a happy birthday: 'My favorite guy' MORE (D-Fla.), who resigned as DNC chair in 2016 after hacked emails showed that her staffers were trying to sabotage Sanders’s presidential bid that year.

More endorsements are expected as the primary calendar shifts to more favorable terrain for Biden in states such as Florida, Georgia, Michigan, Mississippi and Ohio.

Longtime Rep. Bennie Thompson Bennie Gordon ThompsonDHS IG won't investigate after watchdog said Wolf, Cuccinelli appointments violated law Hillicon Valley: Dems seek to expand DHS probe after whistleblower complaint | DHS rejects House subpoena for Wolf to testify | Facebook rolls out new features for college students DHS rejects House Democrats' call for Wolf to testify MORE (D-Miss.), a Black Caucus member who serves as chairman of the House Homeland Security Committee, told The Hill he will formally endorse Biden ahead of Mississippi’s primary on March 10.

“If you hold on, I will be [endorsing Biden] shortly,” Thompson said.

The groundswell of support and newfound momentum comes at a critical time for Biden, who will battle it out with Sanders, Sen. Elizabeth Warren Elizabeth WarrenNo new taxes for the ultra rich — fix bad tax policy instead Democrats back away from quick reversal of Trump tax cuts It's time for newspapers to stop endorsing presidential candidates MORE (D-Mass.) and former New York City Mayor Mike Bloomberg on Super Tuesday, where one-third of all 3,979 delegates are up for grabs.

“I think he has the wind at his back,” Democratic strategist Jon Reinish, a former aide to Sen. Kirsten Gillibrand Kirsten GillibrandSuburban moms are going to decide the 2020 election Jon Stewart urges Congress to help veterans exposed to burn pits The 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 MORE (D-N.Y.), told The Hill. “South Carolina changed the game. It wasn’t just that Biden won. It was who he won, where he won, and the incredible numbers he won by.”

The consolidation of the moderate lane could stand to give Biden a needed boost in California with its 415 delegates and Texas, where White House hopefuls will be competing for 228 delegates.

Additional support from Klobuchar’s and Buttigieg’s supporters gives Biden a better chance of reaching the 15 percent viability threshold in California and Texas, where Sanders has a better chance of winning. Biden does not need a statewide victory to shore up delegates so long as he reaches the threshold.

“We’re no longer dividing the pot between four, five or six people. We’re dividing it between three people,” said Kelly Dietrich, the founder and head of the National Democratic Training Committee, which works with Democrats running for office.

However, Biden isn’t dominating the moderate lane just yet. Bloomberg will make his debut on the ballot Tuesday after blanketing the country with high-dollar ad buys.

“I will tell you, I talked to Mayor Pete and Amy Klobuchar,” Bloomberg said. “They represented their country and their states very well, and I felt sorry for them, but I’m in it to win it.”