US President Barack Obama has been receiving a lot of flack for his management of the fight against Islamic State (ISIS), and joining to that criticism on Sunday was leading Democratic Senator Dianne Feinstein (D-CA), a longtime ally of Obama.

Feinstein, who is the ranking Democrat on the Senate intelligence committee, just last week attacked Obama for saying immediately before the lethal ISIS attacks in Paris that left 129 murdered that the US had "contained" the jihadist group. Obama likewise said immediately after the attack that it was a "setback" but that he had the "right strategy" to defeat the group. Feinstein condemned the remarks, saying ISIS is in fact "expanding."

Appearing on CBS's Face The Nation with host John Dickerson, the senator was asked whether a briefing with US Secretary of State John Kerry had alleviated her concerns about Obama's ISIS policy.

“No, I don’t think the approach is sufficient to the job,“ Feinstein said. “I think there are general principles and their general principles in terms of the administration’s strategy, too, but I’m concerned that we don’t have the time, and we don’t have years. We need to be aggressive now, because ISIL (ISIS - ed.) is a quasi-state.”

When asked if Obama had been too cautious in confronting ISIS, she added, "what I’m saying is this has gone on too long now. It has not gotten better. It’s gotten worse.”

Obama recently deployed 50 US commandos to Syria in a blatant breach of his longstanding campaign promises. Feinstein criticized the move, saying the small number would not solve the problem and a larger plan was called for.

Back in June, Obama admitted in an international press conference during the G-7 conference that he does not have "a complete strategy" to fight ISIS.