The fundamental problem is partisan polarisation. If you believe, as I do, that polarisation is due mainly to increasingly efficient sorting of American voters into parties according to personality type, then procedural tweaks will look unlikely to make a meaningful difference. But this is not to say that a major procedural overhaul wouldnt help. I suspect the discontents of polarisation would be greatly alleviated by replacing Americas creaking legislative system with a proportional-representation parliamentary system. There arent just two kinds of personalities, liberal and conservative. Moral/ideological temperament is complex. Multiplying parties would offer voters the chance to sort themselves into finer-grained partisan identities while adding flexibility to the politics of coalition-building and law-making.