CREATE TABLE table_18212 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Status" TEXT, "Opponent" TEXT)

Who was in the election that was for incumbent bud shuster's seat?
SELECT "Opponent" FROM table_18212 WHERE "Incumbent" = 'Bud Shuster'
SELECT "Opponent" FROM "table_18212" WHERE "Incumbent" = 'Bud Shuster'