The call he made to stop your state from certifying
We've got to fight for our country. We can't let these people take our country away from us.
To two Wayne County canvassers, by phone · November 2020
After Michigan voted for Biden, Trump personally called the two Republican members of the Wayne County canvassing board, which covers Detroit, urging them not to certify the results; the party chair on the line told them to "not sign it." Without that certification, the state's result could not be finalized. The canvassers certified anyway. It was part of a broader push, including a lawsuit the campaign filed and then dropped, to keep Michigan's vote from counting.
Sources: The canvasser call (The Detroit News, via Yahoo)