Vice President JD Vance said Tuesday that President Donald Trump is still hoping that negotiations with Iran will result in an agreement on ending Tehran's nuclear enrichment program. However, Trump remains "locked and loaded," should the negotiations fails."It takes two to tango," Vance said at a raucous White House press briefing in which he was a substitute press secretary. "We are not going to have a deal that allows the Iranians to have a nuclear weapon." Vance said that he believes the Iranians want to make a deal, and the president has directed diplomacy efforts to negotiation in "good faith."...