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

Former first lady Michelle ObamaMichelle LeVaughn Robinson ObamaDemocrats debate Biden effort to expand map against Trump Michelle Obama presents Beyoncé with Humanitarian Award at BET Awards: 'You inspire all of us' Voting by mail is now a necessity during COVID-19 MORE wouldn't comment during remarks on Saturday on the clash between Democratic White House hopefuls Joe BidenJoe BidenCan Republicans handle the aftermath of Donald Trump? Biden seeks to supplant Trump in Georgia Trump's Mount Rushmore stunt will backfire MORE and Sen. Kamala HarrisKamala Devi HarrisSenators push foreign media to disclose if they are registered as foreign agents Warnock raises almost M in Georgia Senate race in second quarter Liberal veterans group urges Biden to name Duckworth VP MORE (Calif.) and stayed silent on backing one the two dozen candidates seeking the party's nomination. 

When asked by moderator Gayle KingGayle KingMinneapolis police union says members have been 'scapegoated by political leaders' Fox News, CBS morning show hosts return to broadcast studios CBS's Gayle King to host live call-in radio show on coronavirus 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."