The Muslim ban, the David Duke denial, the "Mexican" judge flap, the draft dodger denigrating John McCain's military service, the son of privilege attacking an immigrant Gold Star mother and the constant revisionism and lying about past political positions taken are but a few of the lowlights that have punctuated Donald Trump's chaotic chase for the presidency.
Any one of these offenses would have disqualified any other candidate for president. But the Republican nominee remained competitive against a historically weak Democratic nominee on the promise of bringing radical change and dramatic disruption to Washington.
That appears to be changing. Post-convention polls show Trump falling behind by double digits both nationally and in must-win swing states like Pennsylvania, New Hampshire and Virginia.
And the political ride will only get rockier for Trump in the coming days after he suggested that one way to keep a conservative Supreme Court after Hillary Clinton got elected would be to assassinate her or federal judges. Trump and his supporters have been scrambling wildly all day to explain away the inexplicable, but they can stop wasting their time. The GOP nominee was clearly suggesting that some of the "Second Amendment people" among his supporters could kill his Democratic opponent were she to be elected.
The presidential candidate that House Speaker Paul Ryan endorsed tried to explain away his suggestion of an assassination by telling Sean Hannity his comments were meant to unite supporters before the election. It's too bad for Trump and his supporters that his comments related to what Hillary Clinton would do after being elected and nominating Supreme Court justices that gun owners would not like.
We are in uncharted waters but that does not mean that the way forward is not clear. It is.
— The Secret Service should interview Donald Trump and ask him to explain his threatening comments.
— Paul Ryan and every Republican leader should denounce in the strongest terms their GOP nominee suggesting conservatives could find the Supreme Court more favorable to their desires if his political rival was assassinated.
— Paul Ryan and every Republican leader should revoke their endorsement of Donald Trump. At this point, what else could Trump do that would be worse than implying the positive impact of a political assassination?
— The Republican Party needs to start examining quickly their options for removing the Republican nominee.
A bloody line has been crossed that cannot be ignored. At long last, Donald Trump has left the Republican Party few options but to act decisively and get this political train wreck off the tracks before something terrible happens.
Joe Scarborough, a former Republican congressman from Florida, hosts the MSNBC show "Morning Joe."