CREATE TABLE table_72421 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

In how many districts was the incumbent David Delano Glover?
SELECT COUNT("District") FROM table_72421 WHERE "Incumbent" = 'David Delano Glover'
SELECT COUNT("District") FROM "table_72421" WHERE "Incumbent" = 'David Delano Glover'