Donald Trump proved once again in the final presidential debate that he's the secret weapon…of the presidential campaign of Hillary Clinton.

The nominee of what was once the leading party of American capitalism again went out of his way to piss off even Republicans who haven't retracted their endorsement of him.

His own running mate repudiated his unhinged nonsense about the election being rigged against him — so Trump insisted Wednesday night that he couldn't promise to abide by the results of the election. The audiotape of him bragging about sexually assaulting women has repulsed women voters especially, so Trump sneered about every allegation — and nonchalantly acknowledged that as president, he would pack the US Supreme Court with right-wing justices who would overturn legal abortion.

We're in uncharted territory — it's entirely possible that Donald Trump will do worse on November 8 than any major-party candidate in modern political history.

But maybe even more incredible is the fact that the other major-party candidate on the ballot in three weeks' time could be setting records herself if her opponent wasn't Donald Trump.

As repellant as he is, lots of people seem ready to choose interstellar catastrophe over voting for Hillary Clinton. A recent poll of 18- to 35-year-olds inspired by the Twitter hashtag #GiantMeteor2016 found that one in four young respondents would rather a giant meteor destroy the Earth than see either Donald Trump or Hillary Clinton in the White House.