CREATE TABLE table_59879 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Results" TEXT)

What district re-elected a Republican?
SELECT "District" FROM table_59879 WHERE "Party" = 'republican' AND "Results" = 're-elected'
SELECT "District" FROM "table_59879" WHERE "Party" = 'republican' AND "Results" = 're-elected'