The US political system has countless weaknesses, but Trump has shone a light on one of the deepest weaknesses inherent to all democracies — what happens if/when the majority support fascism, authoritarianism, a holy war to genocide X, etc (not the case atm, but Trump having more than 1% of the vote is insanity).
You could argue that moral citizens should take up arms against tyranny, but that appears to be what the majority of MAGA's believe they are doing, and would be anti-democratic, so you're ultimately just hoping that the more moral and ethical are better at slaughtering the least moral and ethical — not much of a failsafe if you ask me.
I guess my point is that I'm not surprised we have no evidence of other intelligent life, and the great filter preventing universal colonisation seems to simply be life itself...