FILE - In this Aug. 21, 2012 file photo, Tom Perez speaks in Birmingham, Ala. Former Vice President Joe Biden is backing Perez to head the Democratic National Committee, calling the Obama administration labor secretary the "best bet to help bring the party back." (AP Photo/Jay Reeves, File)

FILE - In this Aug. 21, 2012 file photo, Tom Perez speaks in Birmingham, Ala. Former Vice President Joe Biden is backing Perez to head the Democratic National Committee, calling the Obama administration labor secretary the "best bet to help bring the party back." (AP Photo/Jay Reeves, File)

WASHINGTON (AP) — Former Vice President Joe Biden is backing Tom Perez to head the Democratic National Committee, calling the former Obama administration labor secretary the “best bet to help bring the party back.”

Biden cast Perez, a Dominican-American civil rights lawyer who grew up in the Rust Belt, as a tireless champion of working Americans, immigrants and the disabled.

“He knows how to explain why our party’s core beliefs matter to the immigrant family in Arizona and the coal miner in West Virginia. That matters,” Biden said in a statement. “I’ve watched him work. I think I know his heart. That’s why I endorse him as the next chairman of the DNC.”

Biden’s support marks the highest-profile endorsement in the crowded — and still fluid — race to lead the Democratic Party, which has rekindled party divisions exposed in last year’s presidential primary campaign.

ADVERTISEMENT

While former President Barack Obama has praised his former labor secretary as “tireless, wicked smart,” he’s so far withheld a formal endorsement.

Perez, who was quietly urged by the White House to jump into the race, faces his stiffest competition from Keith Ellison, a Minnesota congressman backed by Vermont Sen. Bernie Sanders.

Democratic strategists with knowledge of the chairman selection process say Perez has as much as a 66-member lead among the 447 members of the party who will vote on the next chairman at the party convention in late February. In total, 304 members have indicated who they’re backing.

The strategists spoke on condition of anonymity to discuss the vote counting.

Perez aides say he’s raised more than $825,000 for his campaign, with 73 percent of the donors contributed $200 or less.

Ellison attributed the support to Biden’s sense of loyalty to Perez, who spent much of the past eight years working in the Obama administration.

“At the end of the day, I think we can all agree that the DNC chair must be the choice of the rank-and-file Democratic Party members across the nation,” he said in a statement.

Along with Perez and Ellison, South Bend, Indiana, Mayor Pete Buttigieg, South Carolina Democratic Chairman Jaime Harrison, New Hampshire Democratic Chairman Raymond Buckley, Democratic strategist Jehmu Greene and the executive director of the Idaho Democratic Party, Sally Boynton Brown, are in the race.

While the contests mostly focus on the political logistics of rebuilding the struggling party, the candidates are also working to appeal to a party base furious with President Donald Trump’s early actions and demanding nothing short of complete resistance from their leaders.

“Even though Donald Trump is trying to administer body blows to Lady Liberty, the American people are speaking up loudly and clearly in places all over the country,” Perez said in an interview earlier this week. “We can’t normalize falsehoods.”

ADVERTISEMENT

Ellison, who is holding a news conference with the leaders of the American Civil Liberties Union and Gold Star father Khizr Khan on Wednesday, said Trump’s early actions have made it impossible for Democrats to approach the new administration with anything but a wall of opposition.

“We’re well-past the question of should we just automatically oppose Trump. It’s based on a factual predicate and record,” Ellison said. “Democrats are being told by the people of this country to stand up and fight on their behalf.”