CREATE TABLE table_2217 ("Poll source" TEXT, "Dates administered" TEXT, "Tom Emmer  ( R ) " TEXT, "Matt Entenza  ( DFL ) " TEXT, "Tom Horner  ( I ) " TEXT, "Undecided" TEXT, "Sampling error" TEXT)

What poll source administered their poll on June 14-16, 2010?
SELECT "Poll source" FROM table_2217 WHERE "Dates administered" = 'June 14-16, 2010'
SELECT "Poll source" FROM "table_2217" WHERE "Dates administered" = 'June 14-16, 2010'