Threats on Tuesday by U.S. Republican presidential candidates to scrap the Iran nuclear agreement look difficult to carry out even if the party wins control of the White House next year, said a senior Republican lawmaker and foreign policy experts.
Hours after President Barack Obama hailed the Iran deal as a "new direction," Republican White House hopefuls Scott Walker and Rick Perry vowed to rip it up if they reach the Oval Office, while Senator Marco Rubio suggested he would re-impose sanctions.
But a prominent Republican senator acknowledged that a new U.S. president who wanted to undermine the accord would have limited room to maneuver.