CREATE TABLE table_72383 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" TEXT, "Result" TEXT, "Candidates" TEXT)

how many candidates with result being new seat democratic gain
SELECT COUNT("Candidates") FROM table_72383 WHERE "Result" = 'New seat Democratic gain'
SELECT COUNT("Candidates") FROM "table_72383" WHERE "Result" = 'New seat Democratic gain'