Denis Poroy, Associated Press fileIn this July 1, 2019 file photo U.S. Rep. Duncan Hunter leaves federal court after a motions hearing in San Diego. The race to fill the vacated seat of Hunter, of California, has turned into a GOP slugfest. LAKESIDE, California — Republican U.S. Rep. Duncan Hunter’s resignation from Congress last month after pleading guilty to a corruption charge unleashed a GOP slugfest over the vacancy in one of the party’s few remaining House seats in California. Most of the action in the 50th District involves two Republican heavyweights: Darrell Issa, who is seeking a return to Congress after leaving his seat in a neighboring district two years ago, and Carl DeMaio, a well-known San Diego radio host and political commentator. Both have questioned the other’s loyalty to President Donald Trump and called the other a liar.