A senior Republican U.S. senator said he emerged from a White House meeting with President Donald Trump on Sunday reassured that Trump is committed to defeating Islamic State even as he plans to withdraw American troops from Syria.

Sen. Lindsey Graham had warned that removing all U.S. forces from Syria would hurt national security by allowing Islamic State to rebuild, betraying U.S.-backed Kurdish fighters of the YPG militia battling remnants of the militant group, and enhancing Iran's ability to threaten Israel.

During a morning television interview, Graham said he would ask Trump to slow down the troop withdrawal, which was announced earlier in December and drew widespread criticism.