they were trying to create a paper trail. >> i'll be out there campaigning for him, standing in for him. >> reporter: now charged with violations, wire fraud and filing false campaign reports, the hunters claim the charges are politically motivated. pointing to the fact that prosecutors on the case attended a clinton campaign event. >> if they can cloud his name before the election, they take his seat, a republican seat, they put it in the democrat column. that's the reason they have done the late hit. >> reporter: multiple sources familiar with the case tell cnn the ultimate charging decision was made by u.s. attorney adam braverman, a career prosecutor appointed by attorney general sessions. founding member of the trump caucus in the house in the 2016 campaign -- >> duncan hunter, mr. president. >> reporter: he marks the second early trump backer along with republican congressman chris collins facing criminal charges heading into november's election. congressman hunter's democratic