The United States needs to make a decision to wrap up a deal to salvage Iran’s 2015 nuclear accord with world powers, the Iranian foreign ministry spokesperson said on Monday amid fears that talks in Vienna might collapse. Efforts to clinch a new deal were left in limbo after a last-minute demand by Russia \- now at odds with the West over its invasion of Ukraine – forced the powers to pause talks for an undetermined time despite having a largely completed text. Iranian Foreign Minister Hossein Amir-Abdollahian will visit Russia on Tuesday, ministry spokesperson Saeed Khatibzadeh told a weekly…