Former Democratic Ohio governor Ted Strickland announced on Wednesday that he plans to challenge Sen. Rob Portman (R) in 2016. There's a lot to parse about that contest, and we have more than a year to do so.
To put it visually: Strickland is in red. All of the other senators are in blue.
(We used the always-helpful GovTrack dataset to compile these figures.)
The two oldest new senators were Rebecca Felton, who was appointed in 1922 and served the state of Georgia for one day at the age of 86, and Andrew Houston, who served Texas for two months in 1941, starting his term when he was just over a week younger than Felton. The oldest senator to serve a full term was Isaac Stephenson from Wisconsin, who started his term in 1907 at the age of 78.
Of course, Strickland wouldn't be the oldest senator in office. By January 2017, that title will almost certainly be held by the current front-runner: Sen. Dianne Feinstein (D-Calif.). She'll be 83 years and six months old -- a kid, compared to Rebecca Felton.