The president has criticized past administrations for not keeping control of valuable Iraqi oil fields conquered by the military.
During Tuesday's Democratic debate, Senator Bernie Sanders called former Vice President Joe Biden out for his support of the war in Iraq. "I did everything I could to prevent that war," Sanders said. "Joe saw it differently."
The Syrian military has accused Israel of bombing the T-4 Base in Homs hours after rockets hit an Iraqi military base used by U.S. and allied personnel near Baghdad.
Syria's prime minister said that "the presence of Americans in Syria is a sign of occupation, and we believe that all nations and governments must stand up to their unlawful presence in the region."
The Ain al-Asad air base in Iraq's western Anbar province was one of two military facilities hit by Iranian ballistic missiles last week.
Iraq is considering buying Russia's S-300 surface-to-air missile defense system as the U.S.-Iran rivalry creates new unrest and a need for new defenses.
At least six rockets were fired in the Sunday attack that wounded at least four Iraqi troops.
A majority of respondents to the ABC/Ipsos survey also believed Trump's actions have made the U.S. less safe.
Commander Amir Ali Hajizadeh revealed an operator made the decision to fire at the aircraft in 10 seconds.
In a CNN op-ed, former U.S. Attorney Preet Bharara told GOP Representative Doug Collins that he "should know better" after saying Democrats were "in love with terrorists."
"When they started something like this and Iran responded proportionately, that phase was over. So, if the U.S. is going to start again, definitely we'll have to respond," Iranian Ambassador to the United Nations Majid Takht-Ravanchi told CNN.
Karl Rove, the chief of staff for former President George W. Bush, claimed Friday that military intelligence didn't matter because Qassem Soleimani being "evil" was justification enough for him being killed.
Iraqi Foreign Minister Mohamed Ali al-Hakim said "it was very necessary that all foreign troops need to leave from our territory" but a senior U.S. intelligence official told Newsweek there is "no decision yet."
A poll by Morning Consult and Politico found that 77 percent of registered voters could not find Iran on a world map, and 72 percent could not identify it on a map of the Middle East.
Andrew Napolitano noted that the decision also went counter to executive orders from two previous Republican presidents.
American and Iraqi officials reported a battle damage assessment Wednesday after Iran launched 22 ballistic missiles against the U.S. military and coalition forces housed at two bases in Iraq.
Holly Dagres, a nonresident fellow at the Atlantic Council, told Newsweek that the claim was "utter nonsense."
"The missiles fired last night at us and our allies were paid for with the funds made available by the last administration," Trump said at the White House during a special televised event, flanked by top military generals and administration officials.
"This moment right now is on Barack Obama, not Donald Trump," Fox News contributor Pete Hegseth said.
Iran's Foreign Minister Javad Zarif had previously said that Iran did not plan to escalate tensions further.
Veteran and Democratic Rep. Jason Crow said the president's Twitter post represents "a terrible circumvention of the command structure."
Iraq's Ayn al-Asad Air Base and at least one site in Kurdistan's Erbil were hit by cruise missiles and short-range ballistic missiles launched from within neighboring Iran, Newsweek has learned.
The statement comes amid concerns that Trump is out of step with senior-ranking members of his administration, who in recent days have walked back his threats to attack Iran's cultural sites.
The former vice president's comments in 1998 have resurfaced as he faces criticism over his support for the 2003 Iraq War.
"The U.S. will receive the definitive resolute response to its brazen, criminal act in a place and at a time it hurts most," Iran's Foreign Minister Javad Zarif said in a speech Tuesday.
The president told conservative radio host Rush Limbaugh that Soleimani was a terrorist with the blood of Americans on his hands.
A map shows where and how many U.S. troops are located in the Middle East and Afghanistan, many of them in nations near Iran.
Marine Corps Brigadier General William H. Seely III told Baghdad officials that the U.S. was preparing to move "out of Iraq" in a letter that the Pentagon says should not have been sent.
Robert Malley argued that Trump's policies towards Iran have put Americans "more at risk than they were before" he came into office.
Retired U.S. Ambassador John Limbert warned that President Trump had "no plan" and this could lead to a "disaster."