They're federal agents, not presidential mercenaries. When you work for the federal government, you must obey checks-and-balances even if you don't agree with the politics. We have a whole Watergate scandal to prove it.

Washington D.C. is an at-will employment state. If they feel violated because their job requires a bodycam, they can take their vast litany of talents to any private enterprise that's willing to pay for their retinue. Nobody should go to jail because they don't want to wear a bodycam, after all.