While the former president pardoned Duncan Hunter for his criminal actions, he did not include civil violations.
The congressional candidate later told Newsweek he decided to vote for Joe Biden.
Republican Rep. Duncan Hunter (R-Calif.) has been urged to cease casting votes by the House Ethics Committee, after pleading guilty to a felony charge of campaign funds misuse.
Southern California U.S. Representative Duncan Hunter is seeking funds to run for another term, even though he's been indicted for misappropriating campaign funds.
Republican Duncan Hunter has attacked his Democratic opponent over his grandfather's alleged ties to terrorism. Now, with those allegations called into question, Democrat Ammar Campa-Najjar has changed his position.
Prosecutors have accused the congressman of funding five romantic relationships with women involved in politics, including lobbyists, an aide to a leadership member and even one of his own staffers.
California Republican Duncan Hunter said that as an artillery officer in Iraq his unit likely killed "hundreds" of civilians during his time fighting overseas.
"Attacking anyone for the color of their skin or their religion wasn't OK 75 years ago, and it's not OK now," the 97-year-old World War II veteran said.
The California Republican's attacks on his opponent, Ammar Campa-Najjar, are nothing new, and Democrats are calling them "bigoted" remarks.
"They want us to kill guys compassionately and only under the rules of engagement that they say to," Representative Duncan Hunter complained.
"I felt compassionate for [Hunter] in the beginning, but now the gloves are off," Campa-Najjar told Newsweek, speaking metaphorically. "If he wants to brawl, we're going to brawl.
"Rule number one of an incumbent," Campa-Najjar said of Duncan Hunter. "You never say the name of your opponent. Unless you feel threatened by them."
"Ammar Campa-Najjar is working to infiltrate Congress," the narrator in the video says. "He's used three different names to hide his family's ties to terrorism."
The Justice Department is currently led by Attorney General Jeff Sessions, a Trump-appointee and a former conservative Republican senator from Alabama.
Representative Duncan Hunter, a Republican from California, and his wife were indicted on charges that they spent $250,000 in campaign funds on themselves and their friends.
California Representative Duncan Hunter's candor came after a week of Trump surrogates hurling insults at McCain, whose announcement that he would be opposing CIA pick Gina Haspel roiled some within his own party.
The Special Forces colonel was subjected to a criminal probe after criticizing the FBI's hostage-rescue efforts.