By Tim Hoover
The Denver Post
Look at a list of endorsements for Proposition 103, the measure to raise taxes by nearly $3 billion for education, and you quickly see some of the most influential liberal organizations in Colorado.
ProgressNow Colorado, the Colorado Fiscal Policy Institute and the Bell Policy Center have all lined up behind the tax-increase measure on the November ballot, as have dozens of other traditionally liberal-leaning groups such as teachers unions.
But not everyone on the left is happy.