FILE - In this April 14, 2018 file photo, Senate candidate Todd Rokita speaks at a gun-rights rally at the state capitol, in Indianapolis. As the bitter campaign between Rokita, Luke Messer,  and Mike Braun logs on some Republicans worry that whoever emerges from the May 8 contest could be so wounded that their chances of taking down one of most vulnerable Democrats are slipping away.  (AP Photo/Michael Conroy, File)