There seems to be probable cause.
To many that maybe true. But so far the courts haven’t agreed that there is probable cause and neither has the Congress taken action via the impeachment route. Now maybe enough filings in each state to review the state certification maybe one route and if and when enough states found a lack of proper certification then there maybe standing at the Federal level. Who knows at this juncture.
Upholding the constitution should be sufficient enough, but I guiess that’s now illegal or technically impossible.