The truth is that these old Republicans are ecclesial partisans that put their party ahead of the country. Most of them have "safe seats" so the peoples business comes secondary to self-enrichment. They often look to enhance a narrow group of friends or a small group of supporters. They have no respect for the truth or even the welfare of the general population of their constituency because they know that their districts are constituted that they have a safe seat and will elected no matter what.
As of now they constitute a small minority of congress and are becoming less and less of the Senate. The real problem is that the same minority resides on the left side of the isle of congress. Those on the left that reside in safe seats do the same as those on the right. When they are in the minority they give the same tortured explanation and definitions as the right does. The real problem with all of this is gerrymandering of the districts. I live in district That's so gerrymandered that part of it is separated to allow a safe seat.
The most important cure that would facilitate our representatives working on the peoples business rather than partisan business would be to pass a constitutional amendment that would demand that all congressional districts be competitive. That at anytime if the representative doesn't do the peoples work they can be voted out. Then the people could really have a vote them out policy. The representative would have to take their responsibility to their district seriously.