This fall, more than half of the House districts have only one candidate on the ballot.

Among the Republican targets in the House is Rep. Frank Burns, a Cambria County Democrat who has somehow stayed in office despite facing biennial GOP challenges in the very Republican Johnstown area. Another is Rep. Jim Haddock, a freshman Democrat who won a Lackawanna and Luzerne district by about 4 percentage points two years ago.

Democrats have hopes of unseating Rep. Craig Williams, R-Delaware, who made an unsuccessful bid for the GOP’s attorney general nomination this spring. Outside Pittsburgh, Rep. Valerie Gaydos is also seen as relatively vulnerable.

Rep. Nick Pisciottano, a Democrat, is giving up his Allegheny County district to run for state Senate. Rep. Jim Gregory lost the Republican primary to Scott Barger, who is unopposed in a Blair County district. Brian Rasel, a Republican, faces no other candidate to succeed Rep. George Dunbar, R-Westmoreland.

Rep. Malcolm Kenyatta, D-Philadelphia, is unopposed for reelection but he’s also running for auditor general, raising the possibility the two parties could be tied after the votes are counted.

The state Senate races widely seen as the most competitive are the reelection efforts of Sen. Dan Laughlin, R-Erie, and Sen. Devlin Robinson, R-Allegheny. Dauphin County Sen. John DiSanto, a Republican, is not seeking another term after his district saw significant changes through redistricting. State Rep. Patty Kim, D-Dauphin, and Nick DiFrancesco, a Republican and the Dauphin County treasurer, are facing off to succeed DiSanto.

Democrats have to defend a Pittsburgh state Senate opening because of the retirement of Sen. Jim Brewster, a Democrat. Pisciottano is going up against Republican security company owner Jen Dintini for Brewster’s seat.