At least 25 years old
30 years old
about 24.
30
35
35
35
There are no term limits. The person can stay in office for as long as that person is elected and chooses to remain in the congress. Until they die of old age, if they are elected and reelected into their old age.
Strom Thurmond of South Carolina. He left ofice at age 100.
He must be 35 , same as the president or else he could not become president.
Senator
You can run for congress at age twenty-five.
There is no minimum nor maximum age for a pope.