Testimony from U.S. diplomats pushes both Democrats and Republicans back into their corners.
Those displaced in northeastern Syria have called the operation a form of ethnic cleansing.
Clashes continued over the weekend despite the withdrawal of Syrian Kurdish fighters from the border.
Senior U.S. officials fought to reverse Trump’s withdrawal, with disastrous consequences for the Kurds.
Information from the Syrian Kurds and Iraqi security officials was key to the CIA-led intelligence gathering operation.
In Washington, a Kurdish leader accused the Trump administration of misleading her people.
Under the plan, some 200 U.S. troops would stay to protect the oil fields and fight the Islamic State.
U.S. withdrawal leaves Syrian Kurds turning toward Damascus for support against Turkey.
Turkish air and ground forces pummelled the region, killing Kurdish fighters and wounding civilians.
The move to withdraw American troops from the border goes against the advice of senior defense officials.
The launch is Pyongyang’s most provocative since before the Singapore summit.
Revelations last week threaten to engulf prominent members of the Trump team as well as State Department officials.