Some early Democratic presidential primary campaign clashes last year left former Vice President Joe Biden wondering if Sen. Kamala Harris (D-Calif.) was still his friend. Well, Biden doesn't have to wonder any longer.

Harris on Sunday became the latest former Democratic presidential candidate to endorse former Vice President Joe Biden for the nomination, joining the likes of Sen. Amy Klobuchar (D-Minn.) and South Bend, Indiana, Mayor Buttigieg. Harris, who dropped out of the race last December, said she was backing Biden because she believes the United States "needs a president who reflects the decency and dignity of the American people; a president who speaks the truth; and a president who fights for those whose voices are too often overlooked and ignored." Harris will "do everything in my power" to get Biden to the Oval Office, she wrote on Twitter.

Harris was an intriguing candidate herself at one point, but her campaign never really gained much ground, besides a brief stretch in which she surged after she criticized Biden during an early debate. But she's still a key voice in the Senate. Going forward, don't be surprised to hear rumors about Harris joining Biden's ticket as vice president if he wins the nomination. Tim O'Donnell

Former Vice President Joe Biden picked up the coveted presidential endorsement from Rep. Jim Clyburn (D-S.C.) on Wednesday, the morning after Tuesday night's debate in Charleston.

The decision was expected — the two are old friends, and Clyburn has praised Biden consistently throughout the Democratic primaries. But it's still a big get for Biden with South Carolina heading to the polls on Saturday for the South's first primary. The vice president has remained the favorite in the Palmetto State for quite some time, but he's looked more vulnerable as the national frontrunner, Sen. Bernie Sanders (I-Vt.), makes gains.

Still, Biden has received some positive reviews for his latest debate performance, and some more recent polling suggest he's still in good standing in South Carolina, so Clyburn's endorsement could very well strengthen his lead. Clyburn is a prominent Democratic voice in South Carolina and Washington alike. He serves as the House majority whip and is the highest-ranking black member of Congress.

"I can think of no one better suited, better prepared, I can think of no one with more integrity, no one more committed to the fundamental principles that make this country what it is than my good friend," Clyburn said, appearing alongside Biden at a South Carolina event. Read more at The Associated Press. Tim O'Donnell

As polls hint at a surge among black voters, billionaire and former New York City Mayor Michael Bloomberg on Wednesday picked up three presidential endorsements from members of the Congressional Black Caucus.

Rep. Lucy McBath (D-Ga.), whose son was killed as a result of gun violence, said no one else running for president has done as much as Bloomberg to prevent gun violence. Stacey Plaskett, the delegate from the U.S. Virgin Islands who had previously thrown in for Sen. Kamala Harris (D-Calif.), cited Bloomberg's "policies to bring equality and wealth creation to communities of color and economic development to keep us competitive in the world" as the reason he scored her freed up endorsement. And Rep. Gregory Meeks (D-N.Y.) thinks the former mayor will unite the U.S. behind "the purpose of rebuilding our nation's infrastructure."

The endorsements come after old audio surfaced of Bloomberg defending the stop and frisk policies that occurred in New York City under his watch. Studies have shown the practice disproportionately targeted people of color, and Bloomberg's comments only enhanced those claims. Despite having recently apologized for the practice, he has faced harsh criticism across the board after the comments were revealed, and President Trump's allies have started to label Bloomberg a racist. Read more at The Hill. Tim O'Donnell

Her Democratic presidential campaign ended early after it never really picked up the steam needed to compete nationally, but Sen. Kamala Harris (D-Calif.) did have her fair share of home-state endorsements from California politicians.

Now that she's out of the race, Politico reports, those supporters seem to be flocking to former Vice President Joe Biden, who has largely remained the frontrunner in California even when Harris was still in the primary — it's been Sens. Elizabeth Warren (D-Mass.) and Bernie Sanders (I-Vt.) who have provided the biggest challenges. But Biden is mostly holding steady and received a boost after he reportedly picked up a slew of endorsements from prominent California politicians, including Los Angeles District Attorney Jackie Lacey. Of the new endorsements, five had previously backed Harris, per Politico.

It's unclear if this trend of Harris-to-Biden jumpers will continue outside of California, but Harris actually had the highest number of congressional endorsements behind Biden when she decided to leave the race, so if there is consistent crossover between the two candidates, Biden could benefit even more in the long run from her departure from the race. Of course, there's always been speculation that the pair could eventually team up on a presidential ticket, as well. Tim O'Donnell

Former Secretary of Housing and Urban Development Julián Castro is backing Sen. Elizabeth Warren (D-Mass.). In doing so, he became the most well-known former Democratic candidate to throw his name behind someone still in the running.

It's not a shocker — Castro, who dropped out of the Democratic presidential race last week, always spoke highly of Warren and never challenged her during the primary — but Warren received the news warmly.

Castro never became a serious contender during his campaign, but some analysts think his endorsement could be valuable for Warren, in part because of his heavy focus on immigration and criminal justice. Tim O'Donnell

Rep. Dina Titus (D-Nev.) endorsed former Vice President Joe Biden's Democratic presidential bid Monday during a CNN interview.

Titus, who has worked with Biden in the past, called the former vice president the "best qualified" candidate among a field of "good Democratic" contenders who's built a "broad coalition" in her Nevada district, which includes most of Las Vegas.

Titus' endorsement is notable because she's the first sitting member of Congress from an early voting state (Nevada on Feb. 20 will become the third state to select a nominee, after Iowa and New Hampshire) to back a candidate in the Democratic primaries.

President Trump lost Nevada to Hillary Clinton in 2016, but it was a fairly close race that ended with the candidates just 2 percentage points apart. Tim O'Donnell

Things haven't been going smoothly for Sen. Kamala Harris' (D-Calif.) presidential campaign lately, but the Democratic hopeful is expected to receive a boost Saturday with an endorsement from the United Farm Workers, The San Francisco Chronicle reports.

It's considered a major endorsement from a powerful California-based union established by Cesar Chavez, Dolores Huerta (who personally endorsed Harris this year), and Gilbert Padilla. Home state ties were likely a factor for Harris in this instance, but a win is a win.

The union's executive board reportedly voted "overwhelmingly" to back the senator. UFW President Teresa Romero cited Harris' efforts to help farm workers secure overtime pay, as well as her time spent marching with the group during demonstrations, and advocating for immigrant rights as major reasons why they're throwing their weight behind her.

It's unclear if this will boost Harris' numbers even in California where she's lagging behind Sens. Elizabeth Warren (D-Mass.) and Bernie Sanders (I-Vt.) and former Vice President Joe Biden. Things look even worse nationally for her, as South Bend, Indiana, Mayor Pete Buttigieg has vaulted into fourth place. Besides faltering in the polls, the campaign is also dealing with some internal strife. Perhaps the most recent endorsement will brighten the mood. Read more at The San Francisco Chronicle. Tim O'Donnell