Pennsylvania and Nevada certified Democrat Joe Biden’s election victory in their states, dealing the latest blows to President Donald Trump’s efforts to overturn the election results.

Secretary of the Commonwealth Kathy Boockvar certified Biden’s 80,555-vote victory in Pennsylvania, which was announced in tweet by Democratic Governor Tom Wolf.

Nevada’s Supreme Court also certified the state’s results on Tuesday and Democratic Governor Steve Sisolak will issue a proclamation declaring the winner of the state’s six Electoral College votes.

The Pennsylvania and Nevada certifications are the latest in a series of defeats for Trump, who has repeatedly claimed, without evidence, to have won the Nov. 3 election. His campaign has filed lawsuits and demanded recounts and audits across several battleground states, efforts that have gotten him no closer to a second term.

The Pennsylvania certification is the official declaration that Biden won in the battleground state, which carries 20 Electoral College votes. Wolf said he’s signed the certificates of ascertainment for the electors, who will cast their votes for Biden when they meet on Dec. 14, unless a court intervenes.

“Today’s certification is a testament to the incredible efforts of our local and state election officials, who worked tirelessly to ensure Pennsylvania had a free, fair and accurate process that reflects the will of the voters,” Wolf said in a statement.

Among the other contested battleground states, Georgia certified its election results last week and Michigan on Monday. Arizona is slated to certify on Nov. 30 and Wisconsin by Dec. 1, after a recount in two counties requested by Trump. That will make it impossible for the president to stop Biden from reaching the 270 electoral votes needed to win the presidency.

Trump and his allies continue to challenge the outcome of the Pennsylvania vote, despite numerous court defeats and what legal experts have said is a lack of evidence needed to invalidate votes.

It’s readily apparent to everyone besides Trump and his lawyers that the election is over and Biden has won “resoundingly,” said Bob Bauer, legal adviser to Biden’s campaign.

“Trump did not succeed in Pennsylvania and he will not succeed anywhere else,” Bauer said in a statement. “Trump’s lawsuits will continue to fail, as they have in over 30 cases since Election Day, states will continue to certify their results, and Joe Biden will be sworn in as President on January 20, 2021.”

On Monday, the Pennsylvania Supreme Court ruled that mail-in ballots in Philadelphia and Allegheny counties shouldn’t be discarded because of technical errors like voters failing to print their names if there’s no evidence of fraud.

The Trump campaign’s lawsuit that aimed to block Pennsylvania from certifying its election results was dismissed on Saturday by U.S. District Judge Matthew Brann, who called the complaint a “Frankenstein’s Monster” that had been “haphazardly stitched together” with strained legal arguments and speculative accusations.

On Monday, the campaign filed an appeal seeking to revise the case with a new complaint and force Brann to hold a new hearing on it. The campaign also asked the appeals court to issue a temporary restraining order to block the “effects” of certification, arguing it has until Dec. 8 to prevent the state’s electors from being assigned to Biden.

Trump’s lawyer Rudy Giuliani has said the case should be decided by the U.S. Supreme Court, which has a 6-3 conservative majority. Trump has said his goal is to “decertify” the state’s results one way or another.

Pennsylvania Republicans including U.S. Representative Mike Kelly, a Trump ally, have also sued in state court to block certification on grounds the legislature’s adoption of expanded absentee voting last year was unconstitutional -- even though the legislature was controlled by Republicans and there wasn’t a challenge to the new system until Trump lost.

Trump has advocated on Twitter the idea that Republican-controlled state legislatures could ignore the popular vote for Biden in the Nov. 3 election and appoint competing slates of electors that Congress could consider when it convenes on Jan. 6 to count each state’s electoral votes.

But legal experts say that isn’t likely, especially because it would require multiple states to act and Congress would be compelled to accept the Biden slate of electors as long as they are appointed and all disputes resolved by Dec. 8, the so-called “Safe Harbor” deadline.