There's only about 3000 billionaires in the world, most of whom aren't US citizens. Billionaires definitely use their wealth and business/social cachet to try to influence politics in a direction they see as good, but they don't agree among themselves about what that is, and don't support the same things politically. Many American billionaires support Trump, many others do not, still others aren't saying publicly.
More to the point if you're making a broad generalization about how politicians in the US appeal to different demographic segments within the American electorate, thinking about what significantly less than 3000 billionaires are doing at all is a rounding error.