Erdogan warned European leaders they should "revise their stances" toward Turkey, where scores of the militants are imprisoned.
Studies of leadership decapitation suggest groups like ISIS often find ways to survive.
The ISIS leader's death is a signature achievement of his presidency, but Trump's official account of the terrorist's downfall has come under scrutiny.
The president praised the canine for aiding in the operation that resulted in the death of the leader of the so-called Islamic State.
One of Abu Bakr al-Baghdadi's closest confidants gave Iraqi intelligence teams information on how the Islamic State leader evaded capture for so many years.
The daring raid was the culmination of years of steady intelligence-gathering work — and 48 hours of hurry-up planning.
The House speaker demanded that the White House brief lawmakers on the operation, which led to the death of the ISIS leader.
In the graphic account of the so-called Islamic State leader's death, the president described him as having been "whimpering and crying and screaming.”
President Trump said he didn't alert "some" congressional leaders ahead of the U.S. operation that killed ISIS leader Abu Bakr al-Baghdadi.
The headline on the obituary for the leader of the so-called Islamic State has since been changed, but critics are outraged.
His death is a major blow, but the extremist group has survived the loss of previous leaders and military setbacks.
"He died like a dog," President Trump said during a news conference announcing the extremist leader's death.
Pulling out of Syria is a "grave strategic mistake," the Senate majority leader warned in an op-ed.
Kurdish forces will work with the Syrian government to fend off Turkey’s invasion, a major alliance shift after Trump ordered U.S. troops out of the area.
The former defense secretary warned that national security is "tied inextricably to our alliances," following Trump's decision to abandon the Syrian Kurds.
But President Trump says it’s OK for Turkey and the U.S.-allied Kurds to fight. "Let them!" he tweeted.
A U.S. military official said the situation across northeastern Syria was "deteriorating rapidly."
Turkey’s continued push into Syria comes days after President Donald Trump cleared the way for Turkey’s air and ground offensive.