How majority leaders use the amendment tree to close the Senate floor to amendments—and how a simple rule change could reopen the process.

Four rules changes that will help senators debate more, amend more, and vote more.

A detailed guide to how Senate majorities can avoid unlimited amendments in a talking filibuster.

Efforts to change the rules often reflect politics more than procedure.

The House can help determine what the Senate is able to pass.

Amending measures in the Senate