A growing number of Hill Republicans say they are frustrated with President Donald Trump’s ever-changing strategy in Iran — dangling a ground invasion one day, touting progress in peace talks the next — in a conflict many fear will cost them their majority this fall.

Trump said Thursday the U.S. would attack Iran aggressively, then said, for the 39th time, there could be a deal soon.

A growing number of Hill Republicans say they are frustrated with President Donald Trump’s ever-changing strategy in Iran — dangling a ground invasion one day, touting progress in…