The root cause is first-past-the-post winner-takes-all representation, inevitably leading to a dysfunctional two-party system. Requiring a two-thirds majority

The root cause is first-past-the-post winner-takes-all representation, inevitably leading to a dysfunctional two-party system. Requiring a two-thirds majority for crucial bills is quite doable with proportional representation. It just means having to make slight compromises to end up with something most people will be happy about.