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

A helpful map of the formal positions and internal power relationships that shape Republican Conference strategy.

A historical overview of how Senate Republican leadership has evolved over time.

A straightforward guide to the principal leadership positions in the Senate Republican conference and what each one does. It helps readers understand how party leadership operates behind the scenes.

How internal party rules can shape leadership fights.

Leadership power depends on what senators are willing to tolerate.

A primer on Senate holds.