Does Quinnipiac have a history of being bad pollsters in CO? I seem to remember them being terrible at polling there.
Yes they have.
How does it make sense that 46% approve Bennett but only 43% would vote for him? Most senators would kill to have +17 approval ratings.
It'd odd, but stuff like this happens:
In 2006, Lincoln Chafee lost his Senate seat in RI - despite having a 65% approval rating in the exit poll.
Yes, but Colorado isn't Rhode Island where the partisan lean of the state was too high for even a well-liked Republican like Chafee to overcome.
If this was Wyoming or Oklahoma we were talking about then yes, it would make sense.