Tim Walz laid out Kamala Harris’ potential talking points ahead of her first–and likely only–debate against Donald Trump on Tuesday night. Walz spoke during an appearance at a Democratic campaign field office in Phoenix, Arizona just hours before Harris was set to take the stage. He took the opportunity to give a preview of what his running mate is expected to discuss, while taking the opportunity to label Trump a “nearly 80-year-old man,” who is obsessed with “revenge,” according to CNN. “She’s going to talk about tackling some of the toughest problems, like climate change, and doing it in a way that grows our economy,” Walz said. “On the other side of that screen, you’re going to see a nearly 80-year-old man–who’s in it for himself–talk about revenge and talk about how bad this country is, and talk us down on everything he does.”