While Clinton is preparing for “different Trumps” at the debate, according to NBC News, this Trump is the one she undoubtedly expects to see. Most of the more disciplined Trump that emerged in late August and early September can be attributed to one device: a TelePrompter, which Trump won’t have on Monday.

The question here is just how aggressive Trump will be, and what issues he’ll bring up. Will he stick to calling out her use of a private email server, her judgment in supporting the interventions in Iraq and Libya, the questions over “pay to play” at the Clinton Foundation, and her remarks about the “basket of deplorables?” Or will Trump, as he once suggested he might, bring up the more personally sensitive Clinton scandals of the 1990s? Will we hear names like Monica Lewinsky, Gennifer Flowers, and Juanita Broaddrick, and will Trump confront Clinton directly on his accusation that she enabled her husband’s womanizing and helped trash the women who accused him of sexual harassment?

That kind of attack from Trump—and how Clinton responds—might be the true wildcard of the debate, and an indication that he believes his only path to victory is not by transforming himself in the eyes of undecided voters but by tearing Clinton down.

The Combative, Complaining Trump

Both campaigns have ramped up the time-honored pre-debate ritual of trying to set, or re-set, expectations for how the candidates will perform. Clinton aides have publicly mused whether Trump will get easier questions from Lester Holt because he has put out so few specific policy proposals on which he could be pressed.

Trump, not surprisingly, has been far less subtle. He has told anyone willing to listen that he expects to be treated unfairly, and on Thursday morning, he warned Holt that he doesn’t want “Candy Crowley again”—a reference to the 2012 debate moderator who corrected Mitt Romney in the middle of an exchange on the Benghazi terrorist attack. Trump even tried calling out Holt for being a Democrat, which would be a crafty strategy if it weren’t for the inconvenient fact that, as Time Magazine pointed out, Holt is actually a registered Republican.

Complaining directly to the moderator at the debate is rarely a good look for a candidate, but that has never stopped Trump before. Just ask Megyn Kelly. Trump has repeatedly used the media’s unpopularity to his advantage, and if he feels like Holt is pressing him too aggressively on Monday, don’t be surprised if he treats the NBC anchor as just as much of an opponent as Clinton.

What About Clinton?

Yes, Trump’s unpredictability makes him the main variable in the debate, but there will be two candidates on stage. After weeks of focusing on Trump, Clinton has been talking more about her own policies and vision in the week since she returned to the campaign trail. That strategy is aimed at boosting her own ratings and giving people a reason to vote for her and not merely against Trump, which she hopes will win over some of the voters who polls suggest have drifted over to third-party candidates.