who is the incumbent with candidates being tom ridge (r) 80.9% joylyn blackwell (d) 19.1%
CREATE TABLE "united_states_house_of_representatives_e" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" real,
  "result" text,
  "candidates" text
);
SELECT "incumbent" FROM "united_states_house_of_representatives_e" WHERE "candidates"='Tom Ridge (R) 80.9% Joylyn Blackwell (D) 19.1%';