Democratic US Sen. Michael Bennet trails GOP challenger Ken Buck by 3 points in a Colorado Senate race that has seen outside groups spend heavily on negative campaign ads.
Colorado has played a key role in the narrative of the Obama administration and its political strategy. The Democrats' networked system of sharing campaign resources will be tested Tuesday on Election Day 2010.
Tuesday night in the 2010 primaries produced a mixed outcome – establishment victories for the Democrats and tea party victories for the Republicans.
More than 150 ballot initiatives – on issues from gay marriage to renewable energy – were decided Tuesday.