1803
He ran for the Illinois state Senate in 1996 and was elected that year for the first time.
Garfield was elected to nine terms as a US Congressman . He was elected to the Senate the year he was elected President and so never served in the Senate. He was also a state Senator in Ohio.
No Senators are elected two years. They have 6 year terms.
John McCain was first elected to Congress in the House of Representatives in 1982. He won election to the Senate in 1986. You can verify this information on his senate web site biography at http://mccain.senate.gov/public/index.cfm?FuseAction=AboutSenatorMcCain.Biography
Senate is elected for 6 year terms,
1996
Barack Obama first became a legislator in Illinois-- he ran for the Illinois State Senate in 1996, was elected, and served three terms. He then became a member of congress in 2004 when he was elected to the U.S. Senate from Illinois.
Senators are elected for six year terms of the people of their state.
Marco Rubio was originally in the Florida house of Representatives from 2000 to 2008 and then eventually elected to US Senate in the year 2010 to represent the state of Florida.
1788... 21 U. S. Senators took office on 4 March 1789. 12 of them were elected in 1788, and nine of them were elected in 1789.
Senators are elected every 6 years; however the US Constitution staggered the first Senate terms so that 1/3 of the Senate would come up for reelection at a time rather than have the entire Senate come up for reelection at the same time.