There are no legal restrictions on the number of times a congressman can be re-elected.
As many times as they can until they retire or die. There are no term limits on the US Congress. Many US senators are in their 70s or even 80s, with 15% having 3 terms of service (18 years) or more. Strom Thurmond was elected in the 1950s and died in office after 48 years of service at the age of 100.
If you are talking US Congress then there is no limit to the number of terms a congressman (or Senator) can serve, so they can be reelected as many times as they want if they can get the people to vote for them.
A "filibuster" is a procedure by which a senator can speak on a subject as long as he likes. As long as they do not break for water/bathroom/etc or in anyway yield control of the floor, a senator may speak as long as they like. Strom Thurmond famously filibustered the Civil Rights Act for over 24 hours. In modern times, the Senate doesn't actually require a senator to take the floor and speak to filibuster. All he must do is tell the party's floor leader, I believe.
proxy voting - The practice of allowing a Senator to cast a vote in committee for an absent Senator. Senate Rule XXVI provides that proxies may not be voted when the absent Senator has not been informed of the matter on which he is being recorded and has not requested that he be so recorded. Source: http://www.senate.gov/reference/glossary_term/proxy_voting.htm
no limit
as many as they can as long as the people want them
Six years, but he may be reelected.
how many times may a senator be reelected from pennsylvania?
As many times as they wish
Three times
There are no term limits for senators.
456 because there congress
There is no limit to the number of times a representative can be elected to Congress.
As many times as they are re-elected. The people decide when they should no longer serve, but until then, as long as they want to. There is no limit.
8
every 4 or 2 years