If a trial verdict was reached on the basis of evidence being suppressed, and it later comes to light, the verdict is overturned and a new trial is in order. Is Trump completely logically unfounded in his thought process that the election result is faulty, assuming his facts were accurate? If it is true that there was massive corruption involved in a cover-up that caused a different election result than would have happened otherwise, is it ridiculous to say that the election was based on false pretenses and a new election is in order? Assuming that there would have been evidence that there was massive Russian collusion and interference in the 2016 election, and that was what caused Trump to win, would the Democrats not have been calling for a new election?
The headlines may be more clickbaity than substantive.
Talking purely theoretically. (Incidentally, I personally happen to think Trump is a lunatic.)