Pennsylvania Treasurer Stacy Garrity, a Republican, announced Monday that she is running for governor, setting the stage for a challenge to Democratic Gov. Josh Shapiro in 2026. The second-term state treasurer,

Republicans hope Ms. Garrity, the state treasurer, will give them a shot against Gov. Josh Shapiro. But he will be tough to beat, and the Republican field could still be complicated by Doug Mastriano.

State GOP leaders are expected to throw their support behind Garrity. Many of them are worried about a second run from state Sen. Doug Mastriano.