I agree with the Idea that being in a position for too long increases the possibility of corruption. But, I'll counter with two thoughts:

1.) Shouldn't people have the ability to vote for who they want to represent them? If the people of Vermont want to keep on rejecting Bernie Sanders, why should they not be able to? (Valid counterpoint- Dianne Feinstein)

2.) This is the less trivial one - I fear that term limits would invite more corruption, as the representatives understand they only have a limited amount of time to grease as many palms and make as many connections as possible in their limited amount of time in office. We already have issues with the lame duck period, and those are currently measured in weeks. I can only imagine what I'd be like if a large portion of reps had full lame duck sessions.