Democrats lead battle for Congress

WASHINGTON (CNN) - Call it the overlooked election. An intense battle is going on right now for control of Congress, but it's overshadowed in the media by a historic race for the White House.

So which party has the upper hand in the fight for Capitol Hill?

The answer, according to a new national poll, appears to be the Democrats. In a CNN/Opinion Research Corp. survey released Tuesday, 56 percent of those questioned are backing the Democratic candidate for Congress, while 42 percent support the Republicans.

That's a change from immediately after the GOP convention, when the Democrats had only a 3-point lead lead over the Republicans, 49 percent to 46 percent.