I disagree with the 20 year requirement, Kalwejt.
Eligibility for any political office should be optained automatically whenever you're entitled to vote for that office.
In other words, American citizen and at least 18 years old. That's it.
There's no reason for any other requirements. It's not like an 18 year-old will be elected...but he should be eligible.
I'm 100% behind that. I don't see the point of 2 classes of citizens.
I agree with this as well... although it could lead to more "aristocratic" politicians...