It’s fitting that one of the most contentious presidential campaigns in American history is going out on a negative note. How else could the 2016 election end?

Donald Trump has based his presidential campaign on taking an antagonistic tone, so that part isn’t a surprise. But as the polls tightened in the waning days — the RealClearPolitics average has Trump trailing by only 1.7 percentage points — Hillary Clinton has increasingly mimicked Trump’s take-no-prisoners style.

Clinton and her supporters, including President Barack Obama, have been hitting Trump hard on his past comments about women, tying supportive statements by the Ku Klux Klan around his neck and calling him unfit to be president.

Trump, meanwhile, has used that same loaded word — unfit — while unleashing a tough ad in the campaign’s closing days spotlighting the FBI’s announcement of more emails apparently related to Clinton’s private server. The ad refers to the “pervert Anthony Weiner” and claims Clinton is under criminal investigation (which several media organizations have fact-checked as incorrect).