How did Joe Biden become an senator at age 29?

Question

I thought you have to be 30 years old to become a senator.

Thanks for your input!

Answer 1

So by age 33, he already had more experience in national politics than Obama....interesting perspective.

Answer 2

He was ELECTED to the senate at 29, but turned 30 prior to being sworn in (all that matters).  The age for the House is 25, if I recall correctly.

Answer 3

Senator Biden was 29 on Election Day 1972, but turned 30 before taking the oath of office for the Senate.  He therefore was eligible to serve.