May 11, 2017, POTUS announced the issuance of an executive order forming the bipartisan Presidential Commission on Election Integrity. The President named Vice President Mike Pence as Chairman and Kansas Secretary of State Kris Kobach as Vice-Chair of the Commission:

https://www.whitehouse.gov/briefings-statements/president-announces-formation-bipartisan-presidential-commission-election-integrity/

Despite substantial evidence of voter fraud, many states refused to provide the Presidential Advisory Commission on Election Integrity with basic information relevant to its inquiry. Rather than engage in endless legal battles at taxpayer expense, on January 3, 2018, POTUS signed an executive order to dissolve the Commission, and hand the investigation over to the Department of Homeland Security:

https://www.whitehouse.gov/briefings-statements/statement-press-secretary-presidential-advisory-commission-election-integrity/

There is very little public information available concerning the DHS' investigation which is presumably ongoing under the direction of acting Secretary of Homeland Security Chad Wolf, a Trump appointee and boogeyman of the left. Wolf has 240,000 employees and a 2020 budget of $51.672 billion at his disposal and the vested authority to wiretap US citizens without a court order.

tl;dr there's been on ongoing investigation into Election Integrity for almost three years at DHS, spanning both the 2018 midterms and the 2020 Presidential Election. Assuming POTUS didn't just totally forget that he launched this investigation, we could well be watching a multi-year sting operation play out and POTUS has everything.