President Donald Trump is stumping in western Pennsylvania Saturday night in support of the Republican candidate running in the state’s March 13 special House election, state Representative Rick Saccone.

Democrat Conor Lamb is polling slightly ahead of Saccone, which may well account for the president’s appearance. Breitbart News’s Michael Patrick Leahy writes concerning the significance of the race:

Should Democrats win in Pennsylvania with Conor Lamb, it will give credence to the notion that a highly energized left wing of the Democratic Party is on its way to taking back the House of Representatives. Should Republicans win with Rick Saccone, the premise of “inevitability” of a coming “Blue Wave” that Democrats and the media have been touting will be dealt a severe blow.

The rally begins at 7:00 p.m. Eastern.