Every year the National Journal publishes a list of the members of the House and Senate, they are ranked, based upon their voting behavior, from most liberal to most conservative.
First we will look at Colorado's Democratic Delegation.
Senator Salazar is ranked as the 42nd most liberal Senator, placing him squarely in moderate territory among such Senators as Jim Webb (D) of Virginia, Byron Dorgan (D) of North Dakota and Joe Liberman (ind. D) of Conn.
As for the House Delegation. Representaive Degette (Denver) is far and away the most liberal member of the Colorado Delegation. She is ranked as the 36th most liberal member of the House. The other three Democrats are bunched together towards the more moderate wing of the party. Perlmutter ranks at 150th, Udall ranks at 181st and Salazar ranks as 190th.
Overall we can see that the Colorado Democratic Delegation is more moderate than the average Democrat, with only Diana Degette ranking among the most liberal members of the Congress.