Republicans released a new battery of campaign ads that play on fears of ISIS and terrorism, and the Republican charged with helping elect new GOP congressmen said national security was "popping" as a key issue heading into November. "We're seeing a big uptick on national security issues," U.S. Rep. Greg Walden, R-Oregon, told reporters at a breakfast hosted by The Christian Science Monitor on Friday. He cited a CNN poll showing that 57% of Americans didn't approve of President Obama's handling of terrorism. Walden said it was too early to tell if the issue had overtaken the economy as the chief concern of voters, but on Friday, the National Republican Congressional Committee rolled out paid television ads in four competitive districts that accused Democrats of cutting funds to fight al Qaeda. One of the new spots said that a Democratic candidate supported suspected terrorists keeping their U.S. passports.