> When was the last time a adversarial power was able to hit a sitting president?

Any time they've wanted to. That's the conclusion that I've come to after that dweeb clipped his ear with a bullet.

I would have thought that after Hinckley getting so close to Reagan with a handgun that this kind of thing wouldn't be possible but now I have no doubt any Squeaky Fromme from any country could pull off a presidential assassination if they wanted to.

The reason it hasn't happened yet isn't because the Secret Service valiantly defending the president, it's because the American people are by and large complacent or satisfied with his presidency, foreign citizens are too disinterested, and foreign governments / intelligence agencies view the outcome of his presidency as beneficial to their self interests.

It's kinda perverse but if you stop and think about it in the age of drones Donald Trump remaining president is the biggest act of democracy ever. We all just sort of allow this to happen even though it's becoming more and more trivial by he day to assassinate him.