FILE - In this Nov. 9, 2016, file photo, President Barack Obama and Vice President Joe Biden, with their arms on each other, walk back to the Oval Office of the White House in Washington, after the president spoke about the election in the Rose Garden. Nearly eight years after he was last on the ballot, Obama is emerging as a central figure in the 2020 presidential election. Democrats are eagerly embracing Obama as a political wingman for Joe Biden, who spent two terms by his side as vice president. Obama remains the party's most popular figure, particularly with black voters and younger Democrats. (AP Photo/Pablo Martinez Monsivais, File)
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