CREATE TABLE table_203_615 (id DECIMAL, "district" TEXT, "incumbent" TEXT, "party" TEXT, "first\ elected" DECIMAL, "result" TEXT, "candidates" TEXT)

how many of these congressmen were re elected ?
SELECT COUNT("incumbent") FROM table_203_615 WHERE "result" = 're-elected'
SELECT COUNT("incumbent") FROM "table_203_615" WHERE "result" = 're-elected'