He is safe. The sins of past Presidents are swept under the carpet for “the good of the country.” If another Democrat gets in, they will quietly go about covering up anything that could get him jail time. Honestly, most Americans would be satisfied if he just went away. He will be told to retire quietly, go around making speeches to the true believers, and collect his millions. I know a number of Democrats who have said they should have never voted for him in 2012 and they are sick of his act.
If a Republican gets in, they will be too afraid to go after him and be called a racist. So you have the same basic result.