FILE - Republican House candidate Mark Houck speaks to a meeting of Republicans April 17, 2024, in New Hope, Pa. Houck's campaign to unseat Republican Rep. Brian Fitzpatrick in Pennsylvania's GOP primary could offer hints about swing-district party sentiment in a heated presidential election year. The congressional district in suburban Philadelphia is one of 16 nationwide that Democrat Joe Biden carried in 2020 where voters also sent Republicans to Washington. The Republicans' House majority is so slim that Democrats need to flip just four seats to retake control. (AP photo/Mike Catalini, File)