Iran says it is clamping back down on the Strait of Hormuz, putting the ceasefire at risk. President Trump appeared at a rally at an Arizona megachurch. Businesses are preparing for Monday's launch of an online portal for tariff refunds.

"The White House is working with all relevant agencies to holistically review all of the cases," Karoline Leavitt said.

The president, who has slammed Barack Obama for unfreezing Iranian assets as part of a nuclear deal, is weighing a de facto $20 billion payment to Iran of his own.

Follow live coverage from NBC News of Iran reopening the Strait of Hormuz, oil prices and stocks, Trump peace talks and the Israel-Lebanon ceasefire.

Speaking on Air Force One, Trump said military action would resume if a deal is not done by end of the ceasefire.

President Donald Trump took aim at Fox News commentator Jessica Tarlov on social media after the TV host highlighted Trump's low approval rating.

The president in February directed the Department of Defense to begin reviewing government files related to extraterrestrial life.

Fox News senior foreign affairs correspondent Greg Palkot reports on President Donald Trump’s efforts to end the Iran conflict and secure the Strait of Hormuz on ‘America Reports.’