The Budget Act of 1974 14. The resignation of Jim Wright. Health Care fight in 1993-94. 16. The Contract with America. The Line Item Veto.
More general analyses are also possible.
Some examples are the rise of the committee systems in the House or Senate, the Whig theory of the presidency, presidential-congressional relations under a particular President, the Senate as a Club in the 1940 s and 1950 s, the role of the conservative coalition, the character of the textbook Congress, the impact of the Republican Revolution on the politics of the House or Senate, dilatory tactics in the modern Senate, the impact of divided government,etc.