Hillary Clinton has hired one of the nation's top Latino activists to work on organizing key groups of supporters ahead of November.

Cristobal J. Alex, head of the Latino Victory Project, will join the campaign as a deputy director of voter outreach and mobilization, the campaign and the group announced Monday.

The move comes as Clinton is on the verge of clinching the Democratic presidential nomination Tuesday, with a focus in recent days on the California primary, where her opponent, Sen. Bernie Sanders of Vermont, has made a big play for younger Latino voters.

It follows increasingly hostile remarks by Donald Trump, the presumptive Republican presidential candidate, about a Mexican American judge overseeing a legal challenge to his now-defunct university. He has also attacked the nation's only female Hispanic governor, as well as Latino journalists.