Two hundred thirty-eight former staffers for the former Republican standard-bearers John McCain, Mitt Romney, George W. Bush, and George H.W. Bush have signed an open letter endorsing Vice President Kamala Harris over former President Donald Trump. The letter makes reference to similar letters from the 2020 campaign, wherein former Romney, McCain, and Bush (43) staffers endorsed the former Vice President Joe Biden over then-President Donald Trump.The signatories of the open letter vary in their former political roles. The signatories include everyone from former McCain Chiefs of Staff Mark Salter and Chris Koch to miscellaneous former interns. The open letter attacks...