No one -democrat or republican or whatever else- should lose their job over their opinions. No one should be forced to keep their head down and shut up for fear of backlash.
Otherwise - do not be surprised if your boss concludes that your lofty pursuit of high ideals really needs to be freed from the grubby shackles of association with his morally ambiguous enterprise.
US companies (in almost all states) have the power to hire and fire for any non-protected reason on a whim, without notice unlike most other western countries. There is little-to-no social support if you lose your job in the USA, and the market for finding another diminishes when you say “oh yeah, I publicly embarrassed my last company”. That is a recipe for living in a state of fear. That is the reality of the USA, today, whether it makes pleasant reading or not.
And even should that incredibly unlikely thing come to pass, I can't see public embarrassment of high-up muckety-mucks by worker drones working well, ever, really. "Bringing the name of the company into disrepute" etc. etc. would be all they'd need. Fired for cause, end of story.
There are ways to safely say you disagree with your company's policies, but causing a fuss with worldwide coverage at a major company event seems ... shortsighted at best. You'd be better off asking a very pointed question at one of the "Town Hall" meetings that big companies have, when executives are actually able to be challenged by the worker drones, in front of the whole company, but only the whole company. I'd see that as far more likely to actually succeed in doing something than making a public spectacle. Just MHO.