Nancy Pelosi tried orchestrating a military coup against a sitting president.
“Mr. Trump, they noted, is still the commander in chief; unless he is removed, the military is bound to follow his lawful orders. While military officials can refuse to carry out orders they view as illegal — or slow the process by sending those orders for careful legal review — they cannot remove the president from the chain of command. That would amount to a military coup, the officials said.”
Source: https://www.wsj.com/articles/no-trump-isnt-guilty-of-incitement-11610303966
Source: https://www.nytimes.com/2021/01/08/us/politics/trump-pelosi-nuclear-military.html