CREATE TABLE table_18634 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

what's the party with incumbent being john sparkman
SELECT "Party" FROM table_18634 WHERE "Incumbent" = 'John Sparkman'
SELECT "Party" FROM "table_18634" WHERE "Incumbent" = 'John Sparkman'