A lot of these MMA dudes aren't getting bread like that or just started consistently cracking six figures. The Trump support in UFC is way more about the redneck/white supremacist aspect than the financial values of the Republican party.
This. Fighters love the non-PC rhetoric that Trump endorses, they see it as “Alpha Male” behavior. Most of these guys could care less about actual policies. None of these UFC fighters would be lining up to support a Mitt Romney or Marco Rubio type of Republican.