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Michelle Obama mum on Biden-Harris 'dust-up,' withholding endorsement

Former first lady Michelle ObamaMichelle LeVaughn Robinson ObamaObama honors MLK Day: 'He never gave in to violence, never waved a traitorous flag' Should there be a 'Secretary of Thought'? Obamas to attend Biden inauguration MORE wouldn't comment during remarks on Saturday on the clash between Democratic White House hopefuls Joe BidenJoe BidenWoman accused of trying to sell Pelosi laptop to Russians arrested Trump gets lowest job approval rating in final days as president Trump moves to lift coronavirus travel restrictions on Europe, Brazil MORE and Sen. Kamala HarrisKamala HarrisSenate majority offers Biden new avenues on Trump environmental rollbacks Empire State Building lights on eve of Biden inauguration to honor COVID-19 victims READ: Harris letter resigning from Senate ahead of inauguration MORE (Calif.) and stayed silent on backing one the two dozen candidates seeking the party's nomination. 

When asked by moderator Gayle KingGayle KingWoman who accused Black teen of stealing her phone charged with attempted assault CBS News President Zirinsky wins National Press Club Fourth Estate Award The Hill's Morning Report - Presented by UAE - US records 1 million COVID-19 cases in a week; governors crack down MORE at an Essence Festival on Saturday if she had a comment on the "dust up" between Harris and Biden, Obama simply replied "I do not." 

"I've been doing this rodeo far too long, and no comments," she said, according to a video shared by ABC News

Biden came under fire after Harris attacked his record on busing during the first Democratic debate. 

Obama on Saturday also did not endorse any candidate. 

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"Barack and I are going to support whoever wins the primary, our primary focus is letting the primary process play out," she said. 

Obama added that it's too early to predict who will become the party nominee. 

"It's like trying to figure out who's going to win the World Series on the first seven games, that's where we are right now. It's so early and things will change," she said. 

Obama said she and the former president are watching, supportive and offering advice to candidates who seek it. 

When King asked Obama to share what qualities she believed a president should have, she shot back: "I talked about this in the last campaign but nobody listened." 

"I was like, 'It's a hard job y’all.' Let's be clear, this isn't a joke. It's not a game," she said.

"The leader of the free world with a tweet can start war, can crush an economy, can change the future of our children," Obama added. "It is a real job that requires deep seriousness and focus, somebody who has to have enough understanding of history so that you don't repeat what hasn't worked."