Anthony Weiner Seeks Treatment, Requests Leave Of Absence As Top Democrats Call For Resignation

Breaking the law is not the only criteria for remaining in the US Congress.

Government is a trust, and the officers of the government are trustees; and both the trust and the trustees are created for the benefit of the people.  That -- public office is a public trust has long been a guiding principle of government­.  To uphold this trust, Congress has bound itself to abide by certain 
standards of conduct, expressed in the Code of Official Conduct (House Rule 23) and the Code of Ethics for Government Service.  These codes provide that Members, officers, and employees are to conduct themselves in a manner that will reflect creditably on the House, work earnestly and thoughtful­ly for their salary.

Think of Congress as a school.  You may get in, but if you don't follow the rules, the school's administra­tion can and will boot you out.  Because your behavior reflects on the body as a whole.  
Read the Article at HuffingtonPost