(CNN)President Donald Trump faces a critical week in his last-ditch effort to cling to power as key states are on the brink of certifying their election results, officially confirming Joe Biden as the President-elect.

States certify their results after reviewing disputed ballots, conducting post-election audits and double-checking numbers for accuracy. Federal, state and local election officials from both political parties have said there was no widespread fraud or irregularities in the 2020 election.

Michigan -- where Biden leads by more than 154,000 votes -- is supposed to certify its results Monday, and all eyes will be on the four board members to see if certification happens as planned, or if the two Republican members cow to outside pressure from Trump on top of a last-minute request from the Republican National Committee and state GOP to delay.

Georgia, which already certified the election on Friday and did a manual recount with state Republicans signing off on it, is doing another machine scan of the ballots at the Trump campaign's request. But is unlikely to reverse Biden's victory.