CREATE TABLE table_75622 ("Source" TEXT, "Date" TEXT, "Goldberg" TEXT, "Murray" TEXT, "Silbert" TEXT, "Undecided" TEXT)

What is the date of the poll with Goldberg at 26%?
SELECT "Date" FROM table_75622 WHERE "Goldberg" = '26%'
SELECT "Date" FROM "table_75622" WHERE "Goldberg" = '26%'