It's hard to find many people enthusiastic about voting these days, but a new poll shows a big majority of young people have no interest at all.

A new Harvard Institute of Politics survey finds the percentage of young people who are likely to vote in the midterm elections "is shrinking relative to the last time we asked the question five months ago, and also compared to four years ago at this time."

Just 24 percent of Americans under the age of 30 say that they will "definitely be voting" in the upcoming midterm elections — a sharp decrease of 10 percentage points since a similar survey conducted last November.

Four years ago, 31 percent of young voters reported that they would definitely vote.

This is very bad news for Democrats, who have relied on young voters to build their winning coalitions in the 2008 and 2012 elections. But it's even worse when you consider that young Democrats are even less likely to vote than young Republicans.

For example, 44 percent of those who voted for Mitt Romney in the last presidential election say they are "definitely voting" this year, as compared to just 35 percent of Obama voters who say the same.

Partisan implications aside, it's distressing that more than three-quarters of all Americans under the age of 30 just don't care to vote.