Riverton Mayor Trent Staggs announced plans to run for U.S. Senate next year and challenge first-term Republican Mitt Romney in what could emerge as a competitive primary battle in the deeply conservative state.
Romney, 76, has not yet announced whether he plans to seek reelection, but his transformation from 2012 presidential candidate to a recurring critic of President Donald Trump has led many to believe Trump could be vulnerable in next year's Republican primary.
