I think we need to go even further
Congress has shown it is incapable of keeping partisanship out of the process. 75 percent is unachievable in today’s climate
Both parties should nominate a justice and let the people decide. Terms should be limited to 12 years
The idea of term limits has some merit, but I don't think it is essential to destroy the particular problem we are experiencing.
I think problem exists the most in 51% being a goal, that in itself, supports a two party strangle hold on our current political climate. If 51% is all that is required, then that is a motivator to run towards one side or the other. It forces people to group in situations that may not accurately represent a fair picture of their true political leanings and actual desires, in order for them to more or less do the best they can to keep someone else from doing something, instead of representing what each voters actually wants.
To require a supermajority (75% may be a little steep for the people who just want to fight, and 67% may be more suitable), could allow (no guarantee it will), the opportunity for people to find (or group in) additional parties that more closely represent their own concerns. Then those parties could work together to find the common ground necessary to produce more responsible legislation. I am not trying to fix things so they can get screwed up again, but make it so people are forced to come up with solutions where a simple divide won't accomplish much more than one team versus another.
I also don't want to suggest that I would expect anything to be easily accomplished, because I am not looking for a fast solution as much as a better solution, whether it may be legislation, appointments, or politics in general. I don't care if they don't do crap in Washington DC, and I am more interested in ensuring what they do manage to accomplish, better serves everyone.
If Washington DC cannot manage to get something done, the 10th Amendment of the Constitution indicates the states, or the people themselves, can choose to govern what they think is necessary.