http://usgovinfo.about.com/od/uscongress/a/congress-reluctant-to-punish-its-own.htm
The most fundamental duty of Congress is to make laws. These laws must be coherent in the role of the United States and must promote the execution of the Constitution of the United States. This may...
legislator.
They made law's and they would edit the president's law's.
some duties of congress are, make laws, represent their constitutions, and serve on committees