CREATE TABLE table_72419 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

How many in total were elected first in lost renomination?
SELECT COUNT("First elected") FROM table_72419 WHERE "Result" = 'Lost renomination'
SELECT COUNT("First elected") FROM "table_72419" WHERE "Result" = 'Lost renomination'