A privacy measure for immigration aid workers became a free speech cause for backers of Mr. Shirley, a right-wing YouTube star. Democrats say the furor is fueled by misinformation.
Nick Shirley, 24, has quickly become a hero in the MAGA movement as a YouTube influencer who has produced viral videos claiming to expose fraud in Democratic-led states.
Many Republicans are hoping for financial support from President Trump, whose fund-raising power in the party remains unmatched despite his low poll numbers.
A cutout of President Trump in Cypress, Texas, during the Republican primary runoff for Senate between Attorney General Ken Paxton and Senator John Cornyn in May.
The president’s pull with the party base has been clear and his resources are vast. But his low approval ratings make him a liability with swing voters.
President Trump campaigning with Representative Mike Lawler of New York in May. Republicans have to weigh Mr. Trump’s approval ratings against his popularity among his base.