Tensions between the United States and Iran have risen sharply, with a further escalation after attacks on USA military bases in Iraq by Iranian-backed militias, the storming of the U.S. embassy in Iraq and the assassination of Iran's top military commander Qasem Soleimani in Baghdad by a U.S. airstrike.
The president, speaking to reporters on Air Force One, also threatened sanctions against US ally Iraq after its parliament called on American troops to leave the country.
In a pair of tweets late Saturday, Trump said Tehran was "talking very boldly" about targeting certain US assets as revenge for the killing of Soleimani, the head of the Islamic Revolutionary Guards Corps' elite Quds Force, adding the general was responsible for the deaths of an American and hundreds of Iranian protesters. And if that happens, many of those allies wonder, will Trump have his back?
The leader of Lebanon's Hezbollah political party has also said that Soleimani's death has made US military bases, warships and service members across the region targets for attacks.
Trump has said the operation was conducted to avoid war with Tehran and warned against further escalation, but he has employed tough rhetoric in public, tweeting that the United States had targeted 52 Iranian sites, some "at a very high level & important to Iran & the Iranian culture" if Iran struck any American or American assets in retaliation.
"The more they're able to do, short of taking military actions against the USA, the more likely we are to avoid escalation into direct war between the two countries, which is both in Trump's interest but also very much in the interest of the Iranian government", Bremner said in an interview.
"The Iraqi government must work to end the presence of any foreign troops on Iraqi soil and prohibit them from using its land, air space or water for any reason", it said.
"We have a very extraordinarily expensive air base that's there". It costs billions of dollars to build.
The Trump administration says its goal is to force Iran to negotiate a more comprehensive deal, though that seems a remote prospect given the current realities.
Iran's 2015 nuclear accord with the United Nations Security Council's five permanent members - Britain, China, France, Russia and the United States - plus Germany has been hanging by a thread since the U.S. withdrew unilaterally from it two years ago.
The president also issued a threat to Baghdad after the Iraqi parliament's call for USA and other foreign troops to leave the country in a backlash against the killing of Soleimani.