Claire McCaskill (D) and Roy Blunt (R) are the U.S. Senators representing Missouri in Washington DC. McCaskill's next election will be in 2018. Blunt's next election will be in 2022.
The difference is that the senior Senator has been in office longer than the junior Senator.
Maryland senior senator is Sen. Barbara Mikulski. Maryland junior senator is Sen. Bejamin Cardin.
A junior senator has served in the senate for a shorter time than the other senator from his state; that other senator from his state is a senior senator.
Each state has 2 senators. The one who has been in office the longest is the senior senator.
He is the senior senator from Arizona.
There are 2 senators from each state each serving 6-year terms. The senator with the longer term in office is known as the "senior" senator while the other is known as the "junior" senator.
Yes she is the senior Senator and Susan Collins is the junior Senator.
Carl Levin.
Hugh Segal
Daniel Inouye.
Dianne Feinstein
He is the senior senator from Arizona.