Term limits

I have always been opposed to term limits for US congressmen but I am changing my mind. The argument against term limits has always been that we have elections to take care of that but because the system has been rigged with things like gerrymandering, that is not working. Over 90% of incumbents are re-elected. A congressman is more likely to lose his seat in a primary than in a general election. A reasonable start would be two terms for senators and 6 terms for house members giving each a maximum of 12 years. It is time to get rid of career politicians and open the door to new ideas. The problem is that such a change would have to be approved by the congress.