President Biden has approved a shake-up of the leadership of his campaign, and will dispatch a top White House aide to take over functional control of his re-election effort just as former President Donald J. Trump appears to be seizing control of the Republican primary contest to oppose him. The aide, Jennifer O’Malley Dillon, who was the campaign manager for Mr. Biden’s 2020 campaign and has served as a deputy chief of staff in the White House since he became president, will move to the Biden 2024 headquarters in Wilmington, Del., and direct the campaign’s efforts, according to five people familiar with the discussions. It is unclear precisely what title Ms. O’Malley Dillon will take at the campaign or when the announcement will be made, though it could come later this week. Julie Chávez Rodríguez, the campaign’s manager since shortly after it began in April, is expected to retain that title. “Our campaign manager is and will continue to oversee the president’s re-election efforts, and this campaign will remain laser-focused on defeating Donald Trump and MAGA extremism at the ballot box this November,” said Michael Tyler, the campaign’s communications director.

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Persons: Biden, Donald J, Trump, Jennifer O’Malley Dillon, Biden’s, O’Malley Dillon, Julie Chávez Rodríguez, “, Donald Trump, ”, Michael Tyler Organizations: White, Republican, MAGA Locations: Wilmington, Del