“Withdrawing U.S. forces from northern Syria is a catastrophic mistake that puts our gains against ISIS at risk and threatens America’s national security. Terrorists thousands of miles away can and will launch attacks against America, as the United States learned on September 11, 2001. Pulling out of northern Syria ignores that painful lesson, represents an abandonment of our Kurdish allies despite their vital contributions to the fight against ISIS, emboldens Iran, and serves as an undeserved gift to the Erdogan regime, which has only continued its steady march toward Moscow.