Legislators have a formal set of responsibilities to work together, but there's no hierarchy.
Barney FrankThe most active people in the country know different things, and because each one tends to hear mostly and deal mostly with people with whom they agree, they are reinforced not simply in the conviction that they are right, which is totally appropriate, but that they are the majority. So you have both sides, the Left and the Right, thinking that the majority of the country is really with them.
Barney FrankThere were a lot of Romneys. There's the Romney who was going to be better on gay rights than Ted Kennedy; now there's a Romney who checks with Rick Santorum on that issue.
Barney Frank