(RNN) – President Donald Trump is ordering a drawdown of U.S. troops in Afghanistan, according to reports.
It comes a day after the president on Wednesday ordered that the U.S. withdraw its troop presence in Syria.
According to a defense official who spoke to CNN, it could take months for roughly 7,000 troops to leave Afghanistan, cutting the forces there in half.
The president also announced on Thursday that Defense Secretary James Mattis was leaving his post at the end of February.
Sen. Lindsey Graham, R-SC, who sits on the Senate Armed Services Committee, said he disagreed with the decision, arguing that ISIS has not been defeated in Afghanistan.
“If we continue on our present course we are setting in motion the loss of all our gains and paving the way toward a second 9/11,” he said on Thursday.
He added that “this decision I believe has been made by the president not with sound military advice - against it.”
Sen. Tammy Duckworth, a Democrat on the Armed Services Committee and combat veteran, tweeted that Congress should “defend our alliances and hold our adversaries accountable when Donald Trump refuses to.”