According to Gallup, in October 2006 Democrats held a 64 percent v. 25 percent advantage over Republicans on health care. Today the lead is 44 percent v. 43 percent, a 38-point swing in favor of the GOP. ObamaCare seems to have undone, at least for the time being, one of the Democratic Party’s most potent issue advantages. And the data on a host of other issues isn’t much better (a 29-point swing on combating terrorism, a 27-point swing on the economy, and a 26-point swing on handling corruption in government). Byron York of the Washington Examiner provides the details here.