I am the worst at political predictions, so take this with a grain of salt the size of Saturn, but I predict that Harris will narrowly defeat Trump, the coup attempt will last a few months but fail as some key Republicans turn against him (and he will have zero military support) and Harris will take office, perhaps a little late.
There will be some political violence but as most Trump supporters are obese 52-year-old white men who can’t run more than 10 feet without keeling over dead, it won’t amount to much.