National liberal blog Daily Kos occasionally commissions polls on various races. Their most recent was a national poll on voter enthusiasm. To put it mildly, they found a bit of a gap between Republicans and Democrats:

Voter Intensity: Definitely + Probably Voting/Not Likely + Not Voting

Republican Voters: 81/14
Independent Voters: 65/23
DEMOCRATIC VOTERS: 56/40

In other words, 81% of Republicans polled say they plan to vote in 2010 compared to only 56% of Democrats. This is a bleak result for Democrats who finally seem to be realizing that without Barack Obama on the ballot next year, not only will turnout be depreciated from lack of excitement but many demographics might not come to the polls altogether. Couple that with growing discontent among independent voters, and the worst-case scenario for Democratic incumbents could be emerging.

Just for fun let's take a look at the voter registration breakdown in CD-3, CD-4, CD-7, and statewide. Then let's take a look at the makeup of the electorate if we adjust to assume that 81% of Republicans turn out, 65% of unaffiliateds turn out, and 56% of Democrats turn out as the Daily Kos poll showed. (Raw voter registration percentages are provided along with the altered values in parenthesis.)

CD-3 (Adjusted)

Republican 34.7%  (41.8%)
Unaffiliated 32.1%  (31.0%)
Democratic 32.7%  (27.2%)

CD-4 (Adjusted)

Republican 37.2%  (44.2%)
Unaffiliated 34.6%  (33.0%)
Democratic 27.6%  (22.7%)

CD-7 (Adjusted)

Republican 28%  (34.4%)
Unaffiliated 33.7%  (33.5%)
Democratic 37.7%  (32.1%)

Statewide (Adjusted)

Republican 34.8%  (41.8%)
Unaffiliated 30.8%  (29.6%)
Democratic 34.4%  (28.6%)

Democrats will probably rally to put on a bit better showing than the Daily Kos poll is predicting now, but in any case it is looking like there will be a distinct advantage for Republicans in turnout. This is basically a flip from the 2008 elections which saw a highly motivated Democratic electorate turn out for Barack Obama. John Salazar, Betsy Markey, and Ed Perlmutter are in for the rudest awakenings as a result: any Democratic candidate elected in 2008 will have their base suddenly M.I.A..

Both of Perlmutter's elections have been in years with highly motivated Democratic bases and these numbers show that CD-7 could transform into an effective Republican-plurality district when adjusted for turnout. Betsy Markey was an aberration, the floor will fall out from underneath her now that she lacks both an unpopular Republican opponent and sharing the ballot with Obama. John Salazar has had a decent amount of Republican crossover votes, but Republicans making up that large a portion of the electorate when adjusted and combined with anti-incumbent sentiments among independents could doom him.

* Voter registration numbers were taken from COMaps.org for CD-3, CD-4, and CD-7 and are dated August 2009. Statewide numbers were taken from the Secretary of State's statistics for active voter registrations as of October 2009.