Iowa’s U.S. Sen. Chuck Grassley on Wednesday defended an Iowa bill easing gun restrictions, while calling for “bipartisan, common-sense” progress on gun control.Iowans would be able to purchase and carry handguns without permits, should Iowa Gov. Kim Reynolds sign a bill passed this week by the Republican-led Iowa Legislature. Iowans buying a gun from a federally licensed dealer still would have to either pass a federal background check or present a permit to carry.“Some states have that, and I don’t know that in and of itself is a problem in those states,” Grassley told reporters Wednesday on a weekly conference call.