According to exclusive polling data, Mitt Romney received little to no post-convention “bump” following the Republican National Convention in Tampa, Florida, last week. In Ohio, Obama’s previous lead over Romney of 45.3 percent to 44.4 percent has switched to a Romney lead of 46.8 percent to 43.7 percent. Although within the previous polls margin of error, the Republican convention appears to have given Romney a 2 point bump while taking 1 point from Obama. In the Senate race, before the Republican convention, Democrat Sherrod Brown held a narrow 43.6 percent to 41.4 percent lead over Republican Josh Mandel. Again, although within the margin of error, the post-convention poll gives Republican Mandel the advantage at 44.3 percent to 43.5 percent, representing a 3 point bump for Man del, while Brown’s take stayed basically constant.