Michigan Congressman John Conyers plans to run for a 26th term.
Conyers spokesman Andrew Schreiber said Wednesday the 84-year-old Detroit Democrat will run for re-election this year.
The announcement comes shortly after fellow Michigan Rep. John Dingell said he would retire when his current term ends.
Conyers served on Dingell's staff before he was elected to Congress in 1964.
With Dingell's impending exit, a Conyers victory in November would make him the new dean of the House.
Conyers faces a primary challenge from the Rev. Horace Sheffield III, who leads New Destiny Christian Fellowship Church and is the father of Detroit City Council member Mary Sheffield.
Conyers is running in Michigan's 13th District, which includes Detroit and the Wayne County suburbs of Ecorse, Romulus and Westland.