Biden’s victory in Wisconsin was certified following a partial recount that only added to his 20,600-vote margin over Trump, who has promised to file a lawsuit seeking to undo the results.
Governor Tony Evers, a Democrat, signed a certificate that completed the process after the canvass report showing Biden as the winner following the recount was approved by the chairwoman of the bipartisan Wisconsin Elections Commission.
The action on Monday now starts a five-day deadline for Trump to file a lawsuit, which he promised would come no later than Tuesday.
Trump is mounting a long-shot attempt to overturn the results by disqualifying as many as 238,000 ballots. Trump’s lawyers have alleged without evidence that there was widespread fraud and illegal activity.
Even if Trump were successful in Wisconsin, the state’s 10 electoral college votes would not be enough to undo Biden’s overall victory as states around the country certify results.
Earlier on Monday, Arizona officials certified Biden’s narrow victory in that state.
Democratic Secretary of State Katie Hobbs and Republican Governor Doug Ducey both vouched for the integrity of the election before signing off on the results.
Biden is only the second Democrat in 70 years to win Arizona. In the final tally, he beat Trump by 10,457 votes, or 0.3 per cent.
Eleven Democratic electors will meet on December 14 to formally cast Arizona’s electoral votes for Biden.
The certification also paves the way for Democrat Mark Kelly to take his seat in the US Senate.
Republicans’ Senate majority will fall to 52 members when Kelly replaces Martha McSally, who was appointed to the late John McCain’s seat but lost to Kelly in the election.
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