Senate candidate Marty Chavez is outright loathed by New Mexico Democratic activists, though right now he's the leading candidate for the Democrats in the state. From Roll Call:
Other big names committed to raise money for Chavez are Javier Gonzales, a former Santa Fe County commissioner who is a favorite to replace Rep. Tom Udall (D-N.M.) whenever Udall should choose to vacate his seat; insurance executive and prominent Republican fundraiser Bud Dziak; and Mike Anaya, a former chairman of the New Mexico Democratic Party and the brother of ex-Gov. Toney Anaya (D).
Chavez is the Mayor of Albuquerque, and he's basically a developer's DLC dream, which is why it's completely unsurprising a big name Republican would be part of his fundraising operation. It's just business.
Chavez has problems with corruption and big business, and it's interesting that his fundraising base is not coming from Albuquerque. One commenter on Democracy for New Mexico asserts that Chavez actually falsified the names on his finance committee, putting people there who hadn't agreed to serve. I don't know if that's true, but it wouldn't be out of character.