Conyers' exit could open political floodgates

John Conyers' resignation from the U.S. House amid sexual harassment allegations unlocks the seat he's held for more than a half-century.
 
     That could set off a free-for-all race to replace him, with at least three potential legacy candidates, including two Conyers' relatives and a son of a prominent former mayor.
 
     Gov. Rick Snyder will schedule special primary and general elections to fill the vacancy left by Conyers' resignation.
 
     Conyers announced what he called his "retirement" Tuesday after calls to resign from Democratic colleagues. He vehemently denies all accusations.
 
     The 88-year-old civil rights leader endorsed his son, political neophyte John Conyers III. A grand-nephew, Michigan state Sen. Ian Conyers, also plans to run.
 
     Coleman Young II, son of Detroit's first black mayor, is among several pondering a run.