The candidate cannot hold any other public office in the state or federal government during a senate term.
Thomas completed the final year of his Senate term but did not run again in 2003.
He then won re-election in 2004 to a full senate term with 58% of the vote.
In 2011, she was elected to her third Senate term without opposition.
He was re-elected to a second Senate term in 1984.
In 1940 he ran for governor and resigned the remaining two years of his Senate term.
Gravolet died less than a year into his third Senate term.
He was re-elected to a fifth Senate term in 2006.
He also said he had not made up his mind whether to run for a fourth Senate term next year.
"I came to do a job, not join a club," he told an interviewer during his first Senate term.