The state of Pennsylvania certified its election results Tuesday, as Gov. Tom Wolf signed off on the slate of 20 electors and solidified President-elect Joe Biden’s victory in the state where he was born, one of the most hotly contested prizes of the election.

The move in Pennsylvania, a state that Biden won by more than 80,000 votes, follows the certification of the results in Michigan on Monday and Georgia on Friday. All three were states that President Donald Trump won in 2016 and Biden flipped.

With multiple battleground states that Biden won now having certified their results, the flailing effort by Trump and his allies to subvert the election and overturn the votes of millions of Americans is nearing its end.

In Pennsylvania, the Trump campaign and Republican allies had tried to halt the certification for weeks through a flurry of litigation, yet were constantly rebuffed by judges who found the effort lacked any evidence of fraud. The campaign had most recently asked the 3rd U.S. Circuit Court of Appeals to block certification in Pennsylvania. But some legal experts have argued that if Pennsylvania officially certified its results before the court made a decision, the case would be considered moot.

Wolf, in announcing the certification, praised the election workers in his state who had faced harsh criticism and harassment as the president continued his effort to subvert the election.

“I want to thank the election officials who have administered a fair and free election during an incredibly challenging time in our commonwealth and country’s history,” Wolf said in a statement on Twitter. “Our election workers have been under constant attack and they have performed admirably and honorably.”

Multiple counties across Pennsylvania had certified their results Monday amid some scattered efforts by local Republicans to halt the process.

In Allegheny County, the second-largest county in the state and home to Pittsburgh, the board voted 2–1 to certify the results, with Sam DeMarco, the lone Republican member, voting against. DeMarco said his vote was an attempt to spur action in the state capital to make changes to the state’s voting laws, The Pittsburgh Post-Gazette reported.

In Luzerne County, which Trump won by more than 14,000 votes, the board certified the results in a 3–2 vote, again with the Democratic members of the board voting to certify and the two Republicans voting against.

The state had been specifically targeted by Rudy Giuliani, the former mayor of New York and personal lawyer to the president, who repeatedly made baseless allegations of widespread fraud. Shortly after the election, Giuliani delivered a now infamous news conference at Four Seasons Total Landscaping in northeastern Philadelphia, falsely declaring that the city’s election had been marred by fraud and obstruction. Numerous judges would later reject those claims in court.

Although Wolf had certified the results in the state, there are still some outstanding lawsuits regarding smaller amounts of ballots in specific counties that need to be sorted, though they will have no significant effect on the presidential margins.

In the days following the election, Pennsylvania became the center of attention, as multiple counties worked around the clock to process thousands of absentee ballots, providing incremental updates to the overall vote total that saw Biden slowly eclipse Trump and eventually build a significant lead, nearly doubling Trump’s 2016 margin in the state.

One of the chroniclers of the vote swings was Sen. Bob Casey, D-Pa., who would post video updates of his analysis of the vote.

On Tuesday, after Wolf announced the certification, Casey sighed, tipped an open beer from the local brewery Victory Brewing toward the camera, and took a sip.