Democrats are having a hard time convincing people that Donald Trump is, in fact, what they understand is a "convicted felon." This is mostly because voters have difficulty in understanding how what he is accused of is a crime.
Ask people what are serious crimes and you'd get answers like intentionally or recklessly hurting another person, damaging or stealing valuable property, forcing sex on an unwilling victim, aiding a national enemy, failing to pay taxes.
He is accused of doing something legal in order to cover up some unattractive but legal behavior while running for office. Presumably deleting a colorful and perhaps unwise email history would fall in this same category, if done in anticipation of running for office. Hillary did this.
A woman getting her hair styled or losing a few pounds before a public appearance seems to be exhibiting similar behavior. We've all done something of the sort, and considered it "putting our best foot forward."
Most of us who don't hate Trump are going to view this prosecution as a made-up "crime." Prosecutor Bragg's brag, while running for office, that he would find some charge to try Trump on reinforces that belief. So does the fact Trump is apparently the first person ever tried for this offense.