During an appearance on CBS’ “Face the Nation,” Rep. Pete King, R-N.Y., reminded viewers al-Qaeda didn’t need an “excuse” to attack the United States on Sept. 11, 2001 and said the Islamic State wouldn’t need one either.

“They will attack us whenever they can,” he said.

King criticized President Obama for waiting to act against the Islamic State and said he strongly believes the terrorist group plans on attacking the United States.

Since the Islamic State began making advancements in Iraq, the president has ordered a number of airstrikes against the terrorist group. Many wonder if the United States will put combat troops back on the group in Iraq, though President Obama has adamantly been opposed.

Also appearing on “Face the Nation,” Sen. John McCain, R-Ariz., said there should be “additional U.S. troops” assisting in the fight against the Islamic State, but said they should not be involved in combat.

McCain also warned viewers of the severity of the terrorist group.

This is a direct threat to the United States of America,” he said. “It may be one of the biggest we’ve ever faced.”