As of 2012, there are no term limits for Congress.
No limit
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there is no limit
There is no limit in federal law but some states, such as California, place term limits on their senators.
You may take as many times as you wish.
As many times as they wish
Three times
A person can be elected president at most two times.
as many times as the people want
as many times as the member is elected
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There currently is no restriction on how many times a congressman can be re-elected.