The unprincipled Dems are flipping on wall building (just in Arizona so far) because they know Mark Kelly is in trouble of being defeated by Blake Masters in the Senate race. Also, Arizona has 9 congressional seats, 5 democrat and 4 republican. The power balance is in danger of being flipped to republican. The 6th district is the hotspot for republicans who figure to pick up the district.
The Dems just don't have any principles. Power is all they want. Manchin flipped on the Increasing Inflation Act when Dems promised him a 6 billion dollar pipeline in West Virginia. Dems against pipelines? Yeah, you betcha!