@TheSicilianSage,
States can and do limit the number of terms which their members of congress serve. It's not a very clever idea, though, unless all of the states have the same limits. The problem is that both house award important and powerful committee seats based on seniority. If your state imposes term limits, it is effectively denying its congressmen and -women the possibility of getting seats on important committees, because they will never accumulate the seniority of members of congress from other states. Many members of congress who have held their seats for term after term are able to successfully seek re-election because of the power they wield as a result of the important seats they hold on committees.