In a new Gallup poll, Americans rate Republicans less favorably than Democrats, 39 percent to 46 percent.

With the onslaught of scandals surrounding the Obama administration, Democrat favorability fell more than GOP favorability -- by 5 percentage points. GOP ratings, however, are the lowest they have been since May 2010 (even though Republicans went on to win the 2010 elections by historic margins).

The GOP is also deep underwater as far as favorability goes, with 53 percent of Americans seeing the party unfavorably. That's a 14-point spread. Democrats, meanwhile, are about evenly split, with 48 percent of Americans viewing the party unfavorably.

It should be noted that according to Gallup's data going back to 1993, the two lowest points in GOP favorability have occurred just before elections they ended up winning. In 1999, GOP favorability stood at just 31 percent, yet George W. Bush won the 2000 election. In 2010, GOP favorability was also in the low 30s, yet Republicans took back the House in the midterm elections.

The opposite is true for Democrats. They received some of their highest approval ratings before the 2000, 2004 and 2010 elections -- and lost them all.