Prominent Republicans are doing something rare today and speaking out against Donald Trump. Many members of the GOP party say the president’s decision to immediately withdraw all troops from Syria is a mistake.

Watch what else Graham said above.

Senator Marco Rubio, also usually goes along with Trump’s decisions, but not today. He is calling the president’s plan “a grave error.”

Trump’s tweet stating “We have defeated ISIS in Syria” is also causing fact-checking by members of his own party. Rep. Adam Kinzinger replied, “This is simply not true.” Watch what else he told CNN’s Jake Tapper.

Senator Bob Corker seems especially disturbed by what is unfolding.

ABC correspondent Mary Bruce also wrote, “VP Pence just got an earful from GOP senators at their weekly lunch on the president’s decision to withdraw US troops from Syria.”