If he had retired at a normal age he would be alive and healthy and never convicted. What other what ifs can we play.
If he’d won reelection as expected, the Republicans would have been in a less precarious position in the Senate during the maneuvering leading up to Obamacare. An additional vote would have kept the Democrats from cloture moving it forward. That’s a big if and shows even RINO’s are good for something sometimes.