9 years
According to the US Constitution, a person must be a citizen of the United States for at least nine years before being eligible to serve as a US Senator.
A senator must have been a citizen for at least nine years and live in the state that elects him to the Senate.
18yrs
From Article I, Section 3, of the US Constitution: No Person shall be a Senator who shall not have attained to the Age of thirty Years, and been nine Years a Citizen of the United States, and who shall not, when elected, be an Inhabitant of that State for which he shall be chosen. So a candidate for Senator must have been a citizen for 9 years.
Senator.
A senator can serve in the United States Senate for six years. The Senator must have been a citizen of the US for at least seven years.
In order to serve in the House of Representatives, a person must have been a citizen for 7 years.
A naturalized citizen can be a US Senator, although not the US President.
your whole life
To be a U.S. senator you must be 30 years old, and have been a US citizen for nine years prior to election.
To be a senator you must at least 30 years old, have lived in the US for 9 years, and you must live that state you want to be a senator for. To be in the house of Reps. You must be at least 25, have been a citizen of the US. for 5 years,and you must live that state you want to be a representative for.
To become a Senator in the US Senate, a person must be a citizen of the United States for nine years. A Representative in the House of Representatives must be a citizen for seven years.