Imagine three male juveniles who hang out together. One likes to pick fights, and hits hard enough to break bones. The second likes to pick fights, but punches hard enough only to leave bruises. The third doesn't like to pick fights at all, but sometimes goes along with the other two because he'll get beat up otherwise.
The second kid gets along with the other two, but the first and the third really don't like each other. Sometimes the third kid can get the second kid to refrain from picking fights, and thus trump the first kid - but that isn't often. Teh team racks up scores and scores of fights; the seriousness of each one depends on whether the first or second kid prevails at the time.
School administrators address the problem by sending the latter two to detention and by making the first kid hall monitor.
The first kid is the Democratic rank-and-file fiscal liberals. The second kid is fiscally liberal-moderate Republicans. The third is fiscally conservative Republicans. The school administrators are those voters who want to put an end to government overspending but insist on having the Democrats in charge.