Donald TrumpDonald TrumpPelosi describes first meeting with Trump NYT's David Brooks: Trump has not fulfilled promise of new conservatism Should government 'outsource' censorship to Facebook and Twitter? MORE is questioning President Obama's commitment to defeating terrorism.

"It's radical Islamic terrorism. We have a president that won't even use the words," Trump said during an interview with conservative radio host Michael Savage on Monday.

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"And if you don't use the words, you're never gonna get rid of the problem," Trump continued. "Maybe he doesn't want to get rid of the problem. I don't know exactly what's going on."

Trump has repeatedly bashed Obama over his approach to fighting the Islamic State in Iraq and Syria (ISIS). He's also boasted that he'd be the most "militaristic" president if elected and take the fight to Muslim extremists.

Trump also questioned Obama's Christian faith, suggesting last week that "maybe he feels comfortable" in a mosque. 

Trump leads the polls in New Hampshire as voters turn out Tuesday for the first-in-the-nation primary.