Trump on ISIS: US needs to 'knock them out hard'

Donald TrumpDonald TrumpObama reads mean tweet from Trump on ‘Kimmel’ 5 takeaways from the Pa. Senate debate Report: Clinton ordered operative to troll Trump with duck MORE on Monday blasted President Obama’s foreign policy and called for better intelligence to combat Islamic militants in the wake of last week's attacks in Paris.

“We have a president who just doesn’t get it. He’s weak and ineffective," the Republican presidential candidate said on CNBC's "Squawk Box."

Trump suggested the U.S. will have to fortify its intelligence capabilities in order to defeat the Islamic State in Iraq and Syria (ISIS) after the attacks in Paris, which left 129 dead and many more injured.

“This is like no other war we’ve ever had,” Trump said. “This is a war, believe me.

"We're going to have to knock them out and knock them out hard," he added.

Many Republican presidential candidates have long called for a more muscular approach to ISIS, renewing those calls after the Paris attacks claimed by the terrorist group.

Obama vowed over the weekend to redouble efforts to defeat ISIS, as France carried out a new round of airstrikes on an ISIS stronghold in Syria.

The U.S. has also reportedly carried out its first airstrikes in Syria against trucks used by ISIS to transport oil, a major revenue source to fund its operations.

“I’ve been saying attack the oil for two years. … That’s a significant source of their wealth," Trump said Monday.

Trump again suggested that "you would have had a lot different story" in Paris if others had guns to counter the armed terrorists.

He also went after Hillary Clinton, saying the Democratic presidential front-runner "still refuses to say what it is that's happening."

"I mean, she probably thinks these people come from Sweden or something," Trump quipped.