Peter Cetera was a member of Congress.
Peter Paul Cetera ( [ səˈtɛrə ] ; born September 13 , 1944 ) is an American singer , songwriter , and bassist best known for being an original member of the rock band Chicago ( 1967 -- 1985 ) , before launching a successful solo career . Cetera was inducted into the Rock and Roll Hall of Fame as a member of Chicago in April 2016 , and Cetera , Robert Lamm , and James Pankow are among the 2017 Songwriters Hall of Fame inductees for their songwriting efforts as members of the group .