To run for senate a candidate must be

To run for Senate, an individual must be a United States Senator. They must also be at least 30 years of age, a registered voter, and have been a U.S. citizen for at lease 9 years prior to the date of the election. They must also be an inhabitant of the state in which they want to be elected, and have the signatures of at least 10,000 voters in said state.

Very useful. it is to learn because history repeats itself so learning about it those mistakes not happen again.