Why?
6 years in the house is too long. The way it was supposed to work is this;
The people are represented by the house, the states are represented by the senate.
The term in the house was short because they did the people's business, the term in the senate was because they did the state's business and there wasn't a lot in the senate to do.
The people need to be represented by the people that make up that district. If one term is all that is what the people want, then OK the people can select another.
The problem seems to be that many who use this twisted logic of 'not my guy' based on this idea that there is a serious shortage of people who will run and actually do good for the people who elect them. There's no shortage, the only obstacle is the 'not my guy' attitude that is leveraged to get reelected and how the parties use it to further their power.