Enough with the 2010 senator Buck story. Romney and Buck are not on the same league in the GOP. Buck was a far right candidate, Romney is a Right of Center, no where near as extreme compared to Buck. CO is not guaranteed as a GOP pickup, but it is still a competitive state. Stop assuming CO is going to vote for a failing POTUS.
CO is/would be competitive with Romney because he is just about the ideal Republican for the state. With a Southern Evangelical nominee, CO would be off the table for the GOP.