ROLL CALL: Republicans Gain Steam in House Races. “While political reporters and party strategists argue over whether there is an electoral wave ahead, district-level data demonstrates a difficult landscape for Democratic candidates in House races. Democrats believe, as competitive races become more engaged and the party exercises some of its financial advantage to get its message out, that some contests will turn in their favor. That scenario is possible, but in many cases Democratic challenges aren’t developing as quickly as expected and some Democratic incumbents are struggling to gain their footing. We’re changing The Rothenberg Political Report/Roll Call ratings in a half dozen House races, all in favor of Republican candidates.”