Democrats won a special election that gave them control of the Pennsylvania House, ending a deadlock and marking a significant and somewhat unexpected victory.
In an unexpected victory, Democrats took control of the Pennsylvania House.

FactVerify
Source: factverify.com
What the Evidence Shows
The claim states that Democrats took control of the Pennsylvania House in an unexpected victory. Multiple sources confirm that Democrat Dan Goughnour won a special election for a Pennsylvania state House seat, which broke a 101-101 deadlock and restored the Democrats' majority in the chamber. This victory allowed Democrats to maintain control of the House with a narrow margin of 102 to 101 seats.
The win was described as significant and somewhat unexpected given the competitive nature of the district and the previous deadlock. The sources also note that this marked the first time in over a decade that Democrats held majority control, indicating a notable shift in power.
Therefore, the claim is accurate and supported by recent election results and credible news reports.