The story: Reformist Masoud Pezeshkian and hardliner Saeed Jalili will face each other in a presidential runoff as no candidate won a majority of votes on June 28.

Pezeshkian’s campaign is now gearing to engage with voters who boycotted the first round, and highlighting the pitfalls of another hardline administration to boost turnout. Meanwhile, Jalili’s team has tried to present his Reformist rival as a man without a plan.

The results: The June 28 elections were triggered by the death of conservative former president Raisi in a helicopter crash last month. Under the Iranian constitution, snap elections must be held...