WASHINGTON -- President Donald Trump on Monday cast his decision to abandon Kurdish fighters in Syria as fulfilling a campaign promise to withdraw from "endless war" in the Middle East, even as Republican critics and others said he was sacrificing a U.S. ally and undermining American credibility.
Trump declared U.S. troops would step aside for an expected Turkish attack on the Kurds, who have fought alongside Americans for years, but he then threatened to destroy the Turks' economy if they went too far.
Even Trump's staunchest Republican congressional allies expressed outrage at the prospect of abandoning Syrian Kurds who had fought the Islamic State group with American arms and advice. It was the latest example of Trump's approach to foreign policy that critics condemn as impulsive, that he sometimes reverses and that frequently is untethered to the advice of his national security aides.
"A catastrophic mistake," said Rep. Liz Cheney of Wyoming, the No. 3 House Republican leader. "Shot in the arm to the bad guys," said Sen. Lindsey Graham of South Carolina.
Trump said he understood criticism from fellow GOP leaders but disagreed. He said he could also name supporters, but he didn't.
Pentagon and State Department officials held out the possibility of persuading Turkey to abandon its expected invasion. U.S. officials said they had seen no indication that Turkey had begun a military operation by late Monday.
Trump, in late afternoon remarks to reporters, appeared largely unconcerned at the prospect of Turkish forces attacking the Kurds, who include a faction he described as "natural enemies" of the Turks.
"But I have told Turkey that if they do anything outside of what we would think is humane ... they could suffer the wrath of an extremely decimated economy," Trump said.
In recent weeks, the U.S. and Turkey had reached an apparent accommodation of Turkish concerns about the presence of Kurdish fighters, seen in Turkey as a threat. American and Turkish soldiers had been conducting joint patrols in a zone along the border. As part of that work, barriers designed to protect the Kurds were dismantled amid assurances that Turkey would not invade.
Graham said Turkey's NATO membership should be suspended if it attacks into northeastern Turkey, potentially annihilating Kurdish fighters who acted as a U.S. proxy army in a five-year fight to eliminate the Islamic State's so-called caliphate. Graham, who had talked Trump out of a withdrawal from Syria last December, said letting Turkey invade would be a mistake of historic proportion and would "lead to ISIS reemergence ."
This all comes at a pivotal moment of Trump's presidency. House Democrats are marching forward with their impeachment inquiry into whether he compromised national security or abused his office by seeking negative information on former Vice President Joe Biden, a political rival, from Ukraine and other foreign countries.
As he faces the impeachment inquiry, Trump has appeared more focused on making good on his political pledges, even at the risk of sending a troubling signal to American allies abroad. "I campaigned on the fact that I was going to bring our soldiers home and bring them home as rapidly as possible," he said.
The strong pushback on Capitol Hill prompted Trump to recast as well as restate his decision, but with renewed bombast and self-flattery.
He promised to destroy the Turkish economy "if Turkey does anything that I, in my great and unmatched wisdom, consider to be off limits."