Sen. Dianne Feinstein, chairwoman of the Senate Intelligence Committee, on Sunday called President Obama "too cautious" on ISIS.

"I think I've learned one thing about this president, and that is he's very cautious," the California Democrat said in an interview on NBC's "Meet The Press." "Maybe in this instance, too cautious."

Feinstein also called into question the president's characterization, earlier this year, that ISIS is like a junior varsity team — not among the highest caliber of terrorist organizations.

"I think it's a major varsity team, if you want to use those kinds of monikers," Feinstein said.

In all her years on the intelligence committee, including prior to the Sept. 11, 2001, terrorist attacks, Feinstein added, "this is really the first group that has the wherewithal in terms of financing, the fighting machine in terms of a structure — heavy equipment, heavy explosives, the ability to move quickly."