Thundering Caravans (1952)

"He's a One-Man Gang Squaring-Off to Take On an Outlaw Gang in a Blazing Six-Gun Showdown!"

Marshal Rocky Lane is sent to help the Sheriff who is under attack from both the miners whose ore wagons are disappearing and the newspaper editor for not catching the outlaws. But the editor is actually the leader of the gang and with the election forthcoming, she has a plan to make the Sheriff look bad so her son will be elected Sheriff thereby making it easy for them to continue with their robberies.