Interesting point. I haven't thought about it that way. But do you think that's the explanation for all the activities where they flipflop on the other N-M issues?
Yes, partially, it is. If, as a politician, you deeply care about a specific issue that you think is most important, then you should be willing to do whatever it takes on all the other ones to get it done.
In that case, wouldn't it be nice to have a website that identifies every politician's main focus? Based on their votes and maybe with interviews on that page supporting it?
Such a website would be very useful to society, and can be done on city and state levels all around the world.