On Wednesday night Lamb tweeted that Saccone called him with the news.
Lamb held a lead of 668 votes as of Monday. The March 13 special election has not been officially certified and it’s unclear when Lamb will be sworn into the House of Representatives.
Allegheny County had expected to hear ballot challenges on Friday and certify results next week.
But these challenges are likely a moot point given Saccone’s concession.
The Republican candidate confirmed he had called Lamb to concede.
“While there are less than 800 votes separating us, the people of the 18th District deserve to have a voice representing them in Congress,” Saccone said in a statement Wednesday night.
Lamb, a 33-year-old former federal prosecutor and Marine, running in his first campaign for elected office, won in a momentous upset in a region that has been dominated by the GOP for nearly two decades.
More significant than the seat itself, which Lamb will occupy only until January, is the tone the result sets for Democrats nationwide.
And Lamb's victory also puts Democrats one seat closer to the 23 seats they now need in their quest to retake control of the House of Representatives.
Saccone, who ran a fairly traditional campaign that touted his experience in the Pennsylvania House of Representatives and his experience as an Air Force counterintelligence agent, had fundraising trouble from the start. He ultimately lagged behind Lamb by nearly $3 million.
The only thing preventing perhaps a wider margin of victory for Lamb was the injection of outside money into the race. Republican and GOP-aligned groups poured over $10 million into the race on Saccone's behalf, including over $3.5 million from the National Republican Congressional Committee and $3.4 million from the Paul Ryan-aligned Congressional Leadership Fund Super PAC.
Now comes the next election for both men.
Pennsylvania candidates are running under a new House map in November, thanks to a court-ordered redistricting plan.
Lamb filed to run in the fall in the 17th Congressional District, where his hometown of Mt. Lebanon was moved to under the new House map. Republican Rep. Keith Rothfus holds that seat and has $1.2 million in his campaign account.
Meanwhile, Saccone filed to run in the 14th Congressional District, which holds a lot of the 18th’s original acreage and is much friendlier to Republicans than the district in which his hometown of Elizabeth was placed. The new 14th Congressional District has no sitting incumbent. Its area mainly consists of the seat that Murphy held before he resigned.
But both men will face something they didn’t in their last election – primary contests.
Two other Democrats filed to run against Lamb in the 17th Congressional District while one other Republican has filed to challenge Saccone in the 14th Congressional District, according to the Pennsylvania Secretary of State’s website, where candidate petitions were due on Tuesday.
Both men would be favored to win their respective contests in the May 15 primary given the national name recognition they received in last week’s special election.
And should each man prevail in his respective contests in November, they would serve in Congress together next year.