Shannon Bream reported on "Special Report" tonight that the number of Evangelical Christians has increased in the United States. 

A recent Pew poll found that the number of Americans in that category has grown by roughly two million people since 2007. 

"We're continuing to see a strong undercurrent of solid growth within Bible-believing churches here in the United States," Family Research Council President Tony Perkins told Bream.

The poll found that the amount of Americans who identify as Christian has dropped eight percent in the past seven years. In 2007, only 16.1 percent of Americans were unaffiliated religiously, according to Pew. But last year, that number increased to 22.8 percent.

Bream noted that the shifting religious affiliations could impact the political scene. 

Simon Rosenberg, the founder of the New Democrat Network, told Bream that Republicans won't benefit from this change. He asserted that this is one of the reasons why "Barack Obama had two strong Democratic elections back-to-back."

"So yes, this is benefiting the Democratic Party in the short term," Rosenberg stated. "Where it goes in the long term, it's too early to know."

Bream also said that the Pew study found that Islam had the highest growth rate over any other religion in the U.S. in the past seven years.

Watch the video above. 

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