IMHO, this is really more of a threat to Hillary than Trump. Bloomberg hates guns, wants a bigger nanny state. Still, he’d be better than Hillary.
He always said he wouldn’t run if Hillary is running. Two possibilities: 1. He is just going to be on the ballot but only campaign if Hillary gets indicted, making him a ready to go alternative when she drops out. 2. He is planning to run to the right, saying he is a lifelong Republican, cynically going after GOP votes to split the GOP.