VP Vance is in Pakistan this weekend for ceasefire talks with Iran. An ex-Trump Iran negotiator shares his best-case scenario

Nate Swanson, who served on Trump’s Iran negotiating team last year, tells CNN’s Dana Bash the best-case scenario for this weekend’s negotiations is “to end the war and then to do it under terms that don’t have long term damage to the U.S.,” he adds, “You don’t want to give all sanctions to just end the war. You want to just focus very, very narrowly.”