RNC to cut off funds for Trump The open letter pushes the RNC to shift resources to Senate and House races . More than 70 Republicans have signed an open letter to Republican National Committee Chairman Reince Priebus urging him to stop spending any money to help Donald Trump win in November and shift those contributions to Senate and House races . The letter comes as a number of Republican senators and high - profile GOP national security officials have come forward saying they can not vote for Trump .