Either way, when he gets in he should start an investigation. He can promise that now and encourage the courts to do so before he enters office
if the US want to be seen as democratic they should allow a full investigation otherwise his presidency will have a dark cloud over it. It's not a good look.
There is no getting around it whether indtigated by the courts or by him. Really depends if he really wants to unite the country or not.
What a load of nonsense.