CREATE TABLE table_203_800 (id DECIMAL, "#" DECIMAL, "president" TEXT, "president's party" TEXT, "senate with" DECIMAL, "senate opposed" DECIMAL, "house with" DECIMAL, "house opposed" DECIMAL, "years served" DECIMAL, "elections won" DECIMAL)

who was the last president from the republican party ?
SELECT "president" FROM table_203_800 WHERE "president's party" = 'republican' ORDER BY "#" DESC LIMIT 1
SELECT "president" FROM "table_203_800" WHERE "president's party" = 'republican' ORDER BY "#" DESC NULLS LAST LIMIT 1