evidence: Over 100 Republican former national security officials and members of Congress endorsed Vice President Kamala Harris in a letter of support Wednesday, calling former President Donald Trump "unfit to serve again as President, or indeed in any office of public trust." [...] The list also includes some Republicans who did not endorse President Joe Biden in a similar open letter in 2020: former members of Congress Charles W. Boustany Jr. of Louisiana, Barbara Comstock of Virginia, Dan Miller of Florida and Bill Paxon of New York. [...] The Reagan staffers join the list of over 230 former Republican staffers who have endorsed the current vice president. Of those, over 40 were staffers on Romney’s election campaigns.