The Global Terrorism Index, compiled by the Institute for Economics and Peace, found that since 2007, deaths related to terror attacks have jumped by over 900 percent in OECD nations.

O'Connell said what's been frustrating for the Trump administration is that "they want to use all tools necessary to stop a threat that appears to be metastasizing around the world, and essentially what the Democrats are saying is 'well, we should just continue with our course of action.'"

Many Americans do not favor the ban, despite the support from Trump's base, and some experts said there is a disconnect between Trump's anti-terrorism policies and the actual threat. They say that many terrorism attacks or attempted attacks have come from people already living inside the United States.

One example is the Orlando, Florida shooter who last year opened fire inside a gay nightclub and killed dozens of people. The attacker, a U.S. citizen of Afghanistan descent, had pledged allegiance to terror group Islamic State.

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