CREATE TABLE table_28869 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" TEXT, "Result" TEXT, "Candidates" TEXT)

What party did john s. barbour represent?
SELECT "Party" FROM table_28869 WHERE "Incumbent" = 'John S. Barbour'
SELECT "Party" FROM "table_28869" WHERE "Incumbent" = 'John S. Barbour'