Iran must acquiesce to US President Donald Trump's demand that it not acquire a nuclear weapon or "there will be all hell to pay," White House press secretary Karoline Leavitt said on Friday.
"(Trump's) ultimate goal and the ultimate objective is to ensure that Iran can never obtain a nuclear weapon," she told reporters.
"The president believes in diplomacy, direct talks, talking directly in the same room in order to achieve that goal," she added. "But he's made it very clear to the Iranians and his national security team as well that all options are on the table and Iran has a choice to make: you can agree to President Trump's demand or there will be all hell to pay."