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.
Robert F. Kennedy Jr., then a prominent anti-vaccine activist, preempted the 2019 visit with a letter to the Samoan prime minister requesting to study the Pacific island nation's measles, mumps and rubella vaccines after the deaths of two children who had received them. In the letter, he used the words vaccine or vaccination eight times.