Why the Democrats will get trounced in the midterm election in two graphs

One:

Two:

This election is less about national preference, where the two parties are quite closely matched, than about the enthusiasm of the two party's bases. Republicans are eager to vote. Democrats are not.

It's a funny thing: I think if you'd asked Democrats in 2008 whether they'd be excited if their party managed to pull combat troops out of Iraq and pass health-care reform, a massive stimulus bill, and a large financial regulation bill, I think most of them would've said yes. But governing is a terribly depressing exercise, the economy is in bad shape, and the pool of people who like Democrats is smaller than the pool of people who liked Democrats plus the pool of people who were ready for a change after weight years of Bush.

Source.