The New Yorker’s Eric Lach is in Iowa for the month leading up to the Democratic caucuses. Next week’s debate, in Des Moines, was likely going to focus on health care and other domestic issues core to the Democratic platform, but the agenda may instead be dominated by a discussion of the Trump Administration’s killing of the Iranian general Qassem Suleimani and the United States’ fraught history of war in the Middle East. Polls show that Joe Biden is trusted on foreign-policy issues, but Lach suggests that Bernie Sanders’s history of opposing wars—and his quick and confident articulation of his position on Iran—may sway voters seeking a clear message. Nearly a year into the campaign, votes will finally be cast, and in Iowa the deciding factor may involve personal contact more than ideological positions. Iowa voters tend to say, “ ‘I’ve shaken this person’s hand, and I’ve shaken this person’s hand, and I’m going to make my decision after I’ve shaken this other person’s hand.’ That counts for a lot, I think,” Lach says.