Rep. Tom Quigley, R-Montgomery, trailed by 216 votes Wednesday morning, with all precincts reporting. If he loses, it would cancel out a GOP pickup of a Clearfield County seat long held by retiring Democratic Rep. Bud George.
Also uncalled was an Allegheny County contest, where Republican Rep. Rick Saccone held a 36-vote lead over the man he unseated in 2010, Democrat Dave Levdansky.
Rep. Nick Micozzie, a 17-term Republican incumbent, led by 354 votes with all precincts reporting.
House Republican spokesman Steve Miskin said campaign analysts believe both Saccone and Micozzie will prevail once official results are completed, but that Quigley's race includes about 1,200 absentee ballots, and it's unclear how many have already been counted.
"We feel more firm about Quigley going down, we think that's a pickup for us," said House Democratic spokesman Bill Patton.
The current results, if they stand, would produce a Republican majority of 111-92, which is how the two parties are ending the current two-year legislative session.
Provisional, military and absentee ballots could change the final tally.
House Republican leaders told reporters Wednesday they did not expect major changes in their focus next year, with priorities that include an on-time budget and restrained spending and borrowing.
"A lot of these items, we believe, have bipartisan support," said Majority Leader Mike Turzai, R-Allegheny.
In the state Senate, Democrats won three Republican seats that came open through the retirements of Sens. Jeff Piccola of Dauphin County, Jane Earll of Erie County and John Pippy of Allegheny County. The chamber will remain in Republican control, 27-23, a margin close enough to give the minority party hopes that moderate Republicans might give them influence they have long lacked.
Senate Democratic Leader Jay Costa said a strong hand will help his members push their own agenda and give them greater leverage against conservative initiatives favored by Republican Gov. Tom Corbett, including women's health matters, education spending and human services cuts.
"We're not at 26, we recognize that," Costa told reporters, referring to the number required for majority control. "But we're also not at 20."
In the House, Election Day brought two vacancies. Rep. Eugene DePasquale, D-York, was elected auditor general, and Rep. Matt Smith, D-Allegheny, won Pippy's Senate seat. Both men also won re-election to the House.
The House speaker's office said special elections to fill those seats can't be scheduled until a vacancy occurs, either with the end of the session or by resignation.