Immigration advocates are heartened.
"There's a sea change that's happening in our politics," Bennet, who worked on the latest bipartisan immigration proposal, said last week in Denver. "Republicans and Democrats alike believe that big numbers of people in this country want to get this finished."
Even so, Colorado Rep. Cory Gardner, one of the state's few GOP stars, balks at the idea of citizenship, though he speaks forcefully about the need to appeal to minorities.
He said Congress must first secure the border before discussing citizenship. "If you address that first, we can have a conversation down the road."