In a video released on Twitter on Monday, Castro said he’s throwing his weight behind Warren’s vision for big, structural change aimed at elevating the needs of working people over the wealthy.
“There’s one candidate I see who’s unafraid to fight like hell to make sure America’s promise will be there for everyone,” Castro says in the video narration, before turning to Warren for a staged conversation. “Nobody is working harder than you are.”
Castro isn’t the first 2020 also-ran to endorse a former rival; Ohio Rep. Tim Ryan endorsed former Vice President Joe Biden after dropping out, and former Colorado Gov. John Hickenlooper endorsed his home state Sen. Michael Bennet, for instance.
But Castro’s endorsement matters because it could give Warren some momentum as her campaign slips in polling and fundraising and because it has the potential to bring Warren a base of support that is not elemental to her campaign — not to mention that it substantiates the possibility of a Warren-Castro ticket, if she wins the nomination.
Warren has lagged far behind her competitors like Biden and Vermont Sen. Bernie Sanders in support from the Latino community, the fastest growing electoral demographic in the country.
Castro’s endorsement also has the potential to help Warren in Castro’s home state of Texas, the Democratic primary’s third most delegate-rich state. Warren had been polling well in the Lone Star State into the early winter, but a more recent poll showed Biden running away with the state and Warren falling to third place behind Sanders.
Warren and Castro had worked together when the latter was a member of President Barack Obama’s Cabinet and the former was on the Senate committee dealing with housing, but the respect deepened as they discussed a similar vision for the country on the campaign trail.
Castro told VICE News in June that the first time they met was in 2000, when she came to San Antonio when he was mayor for an alumni event for Harvard, from which he graduated and where she used to teach.