Actually, he might get a lot more mileage out of his $100M if he just ran as an independent. In fact, that might be his real plan - participate in a few dem primaries, then when it becomes clear that the nominee will be one of the far-left wackos, reboot his run as an independent. By not spurning the party outright he'd improve his chances with moderate working-class dems, assuming there still are any of those...