If you compare to the last iteration of this poll, it's likely that Trump's bottom fell out due to COVID. Gardner lost six points but Hickenlooper only gained one; most of those undecideds will probably come back to Gardner, and nearly all of the undecideds here are going to come back to Trump.
Interestingly you're seeing the opposite with Polis. Polis gained 15 points in approval since the last poll and only lost five points in disapproval. Trends right now suggest a lot of incumbent D governors should be titanium.
I wonder if Colorado will vote to the left of New Mexico.
Could be. Pearce and Stapelton both topped out at 43% last year and Polis only ran three points behind Grisham. I think you could potentially have a larger rural surge with a smaller college educated swing to offset it in New Mexico.