Democratic voter enthusiasm has dropped steadily, though the party still holds a lead in a generic ballot matchup, according to a new USA Today/Gallup poll.

Just more than a third of Democrats (35 percent) say they are "more enthusiastic than usual" about the midterms, compared to 53 percent of Republicans.

Moreover, Democratic enthusiasm has dropped 8 percent since last month, and 22 percent since March, reaching the lowest point in the last 11 years.

But it's not all bad news for Democrats. Though their voters' enthusiasm is declining, Democrats lead by 5 percent in a generic ballot matchup, 48 percent to 43 percent. That's the first time USA Today/Gallup has found a Democratic lead since the beginning of the year.