If we don't get control of the voting system, positive ID, vote harvesting, big city manufacture of votes, etc., I don't think he can get re-elected. The SocialDemocrats forcfully tried out their fraud techniques in a major way in the last two elections. They now know for a fact that there is NO bpenalty and that the Republicans will make only token protests. The election final count will be accepted without challenge.In every state with a major SocDem controlled government that city will produce enough votes to overcome any Republican majority in the rest of the state. If there are more votes "cast" than there are living people in the city, there will be some snide comments but no challenge. Republicans seem to be incurably fatalist about these things. If enough states do the EC Compact that the popular vote does decide instead of the EC vote California will itself produce enough noncitizen and harvested votes as well as all the traditional SD tactics votes to overcome any Republican majority in the rest of the country.
We need to have universal Positive ID and One Day Voting and no absentee ballots except for maybe the military and we need paper ballots. Paper ballots are still subject to fraud but it needs huge amounts of vote stealers to do what can be done now with a keyboard. It probably can't be enough to sway a presidential election.