Mr. Trump has not yet made a final decision about whether to strike, said the officials, who spoke under condition of anonymity to discuss sensitive national matters. The conversations have been described as fluid and ongoing, as the White House weighs the risks of escalation and the political and military consequences of restraint.

Israeli Prime Minister Benjamin Netanyahu meets President Donald Trump Wednesday to discuss Iran negotiations, as Washington weighs diplomacy against military action.

White House spokeswoman Karoline Leavitt stated that Tehran would be wise to reach an agreement to avoid any conflict.

Reps. Ro Khanna (D-Calif.) and Thomas Massie (R-Ky.) plan to move next week to force a vote on a resolution to require authorization from Congress before President Trump can use military force against Iran.

WASHINGTON -- The White House on Thursday stated definitively that Iran could produce a nuclear weapon in "a couple of weeks" once given the go-ahead from Ayatollah Ali Khamenei. "Let's be very clear, Iran has all that it needs to achieve a nuclear weapon ...