Trump has routinely lashed out at nations for endangering the security of the U.S., famously threatening “fire and fury” against North Korea if the country’s leader, Kim Jong Un, continued testing nuclear weapons.

Iranian Supreme Leader Ayatollah Ali Khamenei reacted to Soleimani’s death in a U.S. drone strike by vowing “harsh retaliation."

Earlier Saturday, the Department of Homeland Security released a National Terrorism Advisory System bulletin stating that "Iran and its partners, such as Hizballah, have demonstrated the intent and capability to conduct operations in the United States."

However, the bulletin added, "At this time we have no information indicating a specific, credible threat to the Homeland."

Democratic presidential candidates Joe Biden and Elizabeth Warren respectively accused Trump of "incredibly dangerous and irresponsible" behavior and "threatening to commit war crimes."

In the aftermath of Thursday's fatal attack on the leader of Iran’s elite paramilitary forces, Trump has sought to defend his action, saying the U.S. does not "seek war" while warning terrorists not to target American interests.

"We took action last night to stop a war. We did not take action to start a war," Trump told reporters in Miami.

A readout of Secretary of State Mike Pompeo’s call with Russian foreign minister Sergi Lavrov released by the State Department on Friday said Pompeo “made clear that the United States remains committed to de-escalation.”

Trump’s mention of “52 American hostages” is a reference to the Iran hostage crisis that engulfed the remaining years of former President Jimmy Carter’s presidency.

Iranian radicals seized the U.S. Embassy in Tehran on November 4, 1979, taking 52 Americans hostage for 444 days in retaliation for longstanding U.S. support for the recently deposed shah.

In November 1980, with the standoff ongoing, Carter lost his bid for reelection to Ronald Reagan. The hostages were finally released minutes before Reagan’s inauguration on Jan. 20 1981.

Trump tweeted from his Mar-a-Lago resort in Florida, where he chastised Democrats earlier Saturday for their efforts to impeach him.

“As hard as I work, & as successful as our Country has become with our Economy, our Military & everything else, it is ashame that the Democrats make us spend so much time & money on this ridiculous Impeachment Lite Hoax,” Trump said. “I should be able to devote all of my time to the REAL USA!”