Interesting.
Whilst Musk may attract votes from both camps, I would suggest that his main effect will be to split the Republican vote - his adventures with the Trump Administration probably means that his brand is too tainted with the Democrats. With so many elections in the US so close, his antics may have some impact.
As for wealth; is not much of his wealth derived from government subsidies and contracts with his variously companies. I somehow dont see even as open minded and non judgemental a President as Mr Trump allowing that to continue!