People think Colorado is purple, but in the last 2-4 years, it is blue blue blue. Too many Kalifornians have moved in along with illegal immigrants. I believe the only thing that has saved CO from financial destruction as seen in CA due to government incompetence is TABOR. As soon as the dems can find a way to overturn or render TABOR useless, we will go the way of CA.
Internal migration from CA certainly contributes to the demographic changes, but so does immigration. Colorado is rapidly becoming a blue state. People like Tancredo understand what is happening.