It’s an old cliché in politics that a campaign’s best day is usually the first day. Kamala Harris, the Democratic Party’s new presumptive presidential nominee, has given that phrase extraordinary new meaning over the last 24 hours. 

With precious few weeks until the Democratic National Convention in Chicago, Harris essentially took over the entire machinery of her party overnight, inheriting not just Joe Biden’s behemoth presidential campaign in Wilmington, but also the broad support from party leaders around the country who rushed to endorse her after Biden’s historic statement exiting the race on Sunday. Would-be challengers for the nomination like Josh Shapiro and Gretchen Whitmer quickly fell in line. House Speaker Emerita Nancy Pelosi endorsed on Monday, too, saying, “I have full confidence [Harris] will lead us to victory in November”—and well, she better, considering Pelosi’s ruthless maneuvering over the last few weeks to force Biden from the race.