Vice President Kamala Harris’ campaign on Sunday is launching “Republicans for Harris” as she looks to win over Republican voters put off by Donald Trump’s candidacy.

The program will be a “campaign within a campaign,” according to Harris’ team, using well-known Republicans to activate their networks, with a particular emphasis on primary voters who backed former U.N. Ambassador Nikki Haley. The program will kick off with events this week in Arizona, North Carolina and Pennsylvania. Republicans backing Harris will also appear at rallies with the vice president and her soon-to-be-named running mate this coming week, the campaign said.

The Harris campaign shared the details of the program first with The Associated Press before the official announcement.