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Photo: Jim Watson/AFP via Getty Images

Julián Castro, who dropped out of the 2020 presidential race last week, endorsed Elizabeth Warren on Monday.

"There's one candidate I see who's unafraid to fight like hell to make sure America's promise will be there for everyone, will make sure that no matter where you live in America or where your family came from in the world — you have a path to opportunity, too."

Why it matters: It's one of the first high-profile endorsements from a former presidential contender this cycle — and it's significant because Castro is widely viewed as a leading vice presidential pick for the eventual nominee.

Our thought bubble, via Axios' Alexi McCammond: Castro and Warren have been pretty close throughout the primary, and his endorsement reflects that bond they’ve shared.

  • They will be campaigning together, and he will make solo appearances without her as well.
  • If Warren has to be pulled from campaign trail to participate in the Senate impeachment trial, Castro will be a crucial surrogate during that time.

Watch the video:

A tweet previously embedded here has been deleted or was tweeted from an account that has been suspended or deleted.

Go deeper: Elizabeth Warren on the issues, in under 500 words

Go deeper

Exclusive: GOP Leader McCarthy asks to meet with Biden about the border

House Minority Leader Kevin McCarthy at CPAC. Photo: Joe Raedle/Getty Images

House Minority Leader Kevin McCarthy (R-Calif.) has requested a meeting with President Biden to discuss the rising numbers of unaccompanied migrant children at the U.S.-Mexico border, in a letter sent on Friday.

Why it matters: Biden is facing criticism from the right and the left as agency actions and media reports reveal spiking numbers of migrant children overwhelming parts of the U.S. immigration system. Recent data shows an average of 321 kids being referred to migrant shelters each day, as Axios reported.

Vaccine hesitancy drops, but with partisan divide

Illustration: Sarah Grillo/Axios

69% of the public intends to get a COVID vaccine or already has, up significantly from 60% in November, according to a report out Friday from the Pew Research Center.

Yes, but: The issue has become even more partisan, with 56% of Republicans who say they want or have already received a coronavirus vaccine compared to 83% of Democrats.