GOP House candidate concedes to Democrat in Pennsylvania

Republican Rick Saccone is conceding a special congressional election in southwestern Pennsylvania to Democrat Conor Lamb after the GOP considered a recount and legal action.

Lamb's victory has sent shivers through Republicans as they try to keep their U.S. House majority in looming midterm elections. But the official vote count, which began on Friday, found Lamb adding to his lead, ending Wednesday more than 800 votes ahead of Saccone.

President TrumpDonald John TrumpKoch-backed group launches six-figure ad buy against Heitkamp Anti-abortion Dem wins primary fight Lipinski holds slim lead in tough IL primary fight MORE had won the district by more than 20 points in the 2016 election and Lamb's win is considered a good sign for Democrats hoping to retake the majority in Congress in 2018.

The 33-year-old Lamb succeeds Republican Tim Murphy, the eight-term congressman who resigned in October amid a sex scandal.

In the race, Lamb downplayed opposition to Trump, who remains more popular in the district than nationally.

This story was updated with a quote from the National Republican Congressional Committee.

Saccone, 60, adhered to Republican orthodoxy and openly embraced Trump, who tweeted many times on his behalf and campaigned in person twice, including a raucous rally the Saturday before voters cast ballots. Lamb, however, distanced himself from Pelosi and held national Democrats at arm's length while he easily outraised Saccone in campaign cash. Both he and Saccone are now candidates in new districts drawn by the state Supreme Court after it overruled a Republican-drawn map.