Democratic presidential nominee Joe Biden is expanding his transition team with senior campaign aides, vice presidential contenders and a former primary rival, two months before he faces President Donald Trump in the general election.

Biden added four co-chairs to help former Delaware Senator Ted Kaufman oversee the effort. They include Anita Dunn, a senior adviser to the campaign; Representative Cedric Richmond, a national co-chair of the campaign; New Mexico Governor Michelle Lujan Grisham, who was vetted as a potential running mate; and Jeffrey Zients, a top economic adviser to President Barack Obama.