Table:
text: United States House of Representatives elections, 1986
Pennsylvania
Pennsylvania
District Incumbent Party First_elected Result_ Candidates
Pennsylvania 18 Doug Walgren Democratic 1976 Re-elected Doug Walgren (D) 63.0% Ernie Buckman (R) 37.0%
Pennsylvania 21 Tom Ridge Republican 1982 Re-elected Tom Ridge (R) 80.9% Joylyn Blackwell (D) 19.1%

Question: Who is the incumbent with candidates Tom Ridge (r) 80.9% Joylyn Blackwell (d) 19.1% in the 1986 United States House of Representatives election in Pennsylvania?