HARRISBURG (AP) — President Donald Trump is coming to Pennsylvania for a rally the day before voters in a congressional district in the northcentral part of the state pick a new representative to go to Washington.

Trump’s rally is next Monday at hangar by Williamsport Regional Airport in Montoursville. His campaign says Trump was last there in 2015.

Republican Fred Keller and Democrat Marc Friedenberg are vying to fill an open seat created by Republican Tom Marino’s resignation in January.

The district is heavily Republican and voters there backed Trump in 2016’s presidential election by better than 2 to 1 over Democrat Hillary Clinton.

Trump beat Clinton in Pennsylvania, by less than 1 percentage point, and the state is part of his likeliest path to winning a second term.