What Trump has said as he warned Iran not to retaliate against the US

He has not yet responded to Iran's retaliatory attack on Monday.

President Donald Trump warned Iran against retaliation several times following U.S. strikes against Tehran's nuclear facilities on Saturday night.

On Monday, Iran fired missiles targeting Al Udeid Air Base in Qatar -- the largest U.S. military base in the region, raising concerns about escalation. A U.S. official told ABC news the U.S. intercepted Iranian missiles with assistance from Qatar.

President Trump was meeting on Monday with his national security team in the Situation Room and has not yet responded to Iran's retaliatory attack.

In his address to the nation on Saturday night regarding the U.S. strikes against Iran, Trump cautioned Tehran not to hit back.

"Iran, the bully of the Middle East, must now make peace. If they do not, future attacks would be far greater and a lot easier," Trump said.

"There will be either peace, or there will be tragedy for Iran, far greater than we have witnessed over the last eight days," Trump said, referencing the aerial strikes exchanged between Israel and Iran in the days leading up to U.S. involvement.

"Remember, there are many targets left," Trump added. "Tonight's was the most difficult of them all, by far, and perhaps the most lethal. But if peace does not come quickly, we will go after those other targets with precision, speed and skill. Most of them can be taken out in a matter of minutes."

Trump issued a similar message in all capital letters on social media: "ANY RETALIATION BY IRAN AGAINST THE UNITED STATES OF AMERICA WILL BE MET WITH FORCE FAR GREATER THAN WHAT WAS WITNESSED TONIGHT."

Vice President JD Vance was further asked about the possibility of retaliation from Iran during an appearance on ABC News' "This Week" on Sunday.

Vance said "what happens next is up to the Iranians."

"If they're willing to choose the smart path, they're certainly going to find a willing partner in the United States to dismantle that nuclear weapons program," Vance said. "But if they decide they're going to attack our troops, if they decide they're going to continue to try to build a nuclear weapon, then we are going to respond to that with overwhelming force."

Top administration officials said over the weekend the U.S. was prepared for potential action from Iran.

Joint Chiefs Chairman Gen. Dan Caine told reporters on Sunday that before the U.S. strike against Iran on Saturday, the military elevated force protection measures across the region.

While the administration says it is not interested in a wider war with Iran, Trump's strikes against Tehran on Saturday prompted concern about the potential for escalation from Democrats and some Republicans.

This week, some lawmakers may try to advance bipartisan resolutions seeking to limit Trump's war powers and prohibit U.S. forces from unauthorized hostilities with Iran, though those measures face an uphill battle in the GOP-controlled Congress.