Pennsylvania elected a state record four women to the U.S. House on Nov. 6 as Democrats smashed the state's all-male congressional delegation, picked up three seats in the chamber and ousted a three-term Republican.

Meanwhile, Democratic Gov. Tom Wolf will return for a second term, Democratic U.S. Sen. Bob Casey won a third term and Democrats chipped away at the huge Republican majorities in the state Legislature.

In the U.S. House, Mary Gay Scanlon, Madeleine Dean, Susan Wild and Chrissy Houlahan stand to become the first women from Pennsylvania to serve full terms in Congress since 2014, while U.S. Rep. Conor Lamb beat three-term Republican Rep. Keith Rothfus in a suburban Pittsburgh race pitting two incumbent representatives against each other.

Pennsylvania's U.S. House delegation will be a 9-9 tie, giving Democrats their most seats in eight years in a state President Donald Trump narrowly won in 2016's presidential election.

The Democrats' victories came amid a favorable election climate and the state's high- est midterm turnout in nearly 25 years. The party was aided by a backlash against Trump,

the most U.S. House open seats in decades and new court-ordered congressional district boundaries that made seats more competitive.

Pennsylvania has never sent more than two women to Congress at any one time, according to information from Chatham University.

Lamb, a former Marine and federal prosecutor who won a special election in March to an open seat in southwestern Pennsylvania, scored another victory Tuesday in a district that had backed Trump in 2016.

Both Lamb and Rothfus live in a newly drawn district, a quirk of the state Supreme Court's overhaul of Pennsylvania's congressional boundaries after it ruled the districts had been unconstitutionally gerrymandered by Republicans in 2011.

Those boundaries had helped the GOP win 13 of 18 seats in three straight general elections, even as Democrats dominated races for statewide offices.

Elsewhere, nine incumbents won re-election, while Republicans filled three open seats that had heavily favored their party. A 10th incumbent, Mike Doyle, of Pittsburgh, had no challenger. Three Republican incumbents—three-term Scott Perry, four-term Mike Kelly and freshman Brian Fitzpatrick—survived close races.