Leading in financial donations is not at all the same thing as winning the election, which is subject to a VAST number of unknown and uncertain variables.
There are still a lot of low-information POTENTIAL voters out there. The trick is to lull them into staying home, while energizing your own base to very high activity and enthusiasm level.
Money does help there.
What helps most in Michigan these days are new voting laws and an Attorney General and SOS who take them seriously.