Perhaps another sign of a mini-boomlet for Democrats? A new Rasmussen survey in Colorado out this morning (500 LVs, 3/2, MoE +/- 4.5%) shows that both Democrats in the Colorado Senate race -- appointed incumbent Michael Bennet and former House Speaker Andrew Romanoff -- have cut into former Lt. Gov. Jane Norton's (R) leads.

General Election Matchups
Norton 44 (-1 vs. last poll, 2/2)
Romanoff 42 (+4)
Und 9 (-1)

Norton 48 (-3)
Bennet 39 (+2)
Und 6 (-1)

Norton had led both Romanoff and Bennet by 12 points in a January survey. Despite that progress, Democrats still should be concerned about the fact that the two better known figures run even with two other, lesser-known potential Republican nominees, state Sen. Tom Wiens and Weld County DA Ken Buck.

Wiens 41 (-1) -- Romanoff 41 (+1) -- Und 13 (+1)
Wiens 43 (-2) -- Bennet 40 (unch) -- Und 11 (+2)

Buck 41 (-4) -- Romanoff 40 (+1) -- Und 13 (+3)
Buck 44 (-1) -- Bennet 38 (-3) -- Und 11 (+3)

Despite (or perhaps because of) incumbency and the support of President Obama, which included a fundraising visit on his behalf last month, Bennet appears to still be a weaker general election candidate. Obama has a 43 percent approval rating, while 56 percent disapprove.

--------------------------------------------
Follow the RCP Blog on Twitter.
Become a fan of RCP on Facebook.
--------------------------------------------