Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_21535453_1 (source VARCHAR, terry_mcauliffe VARCHAR, dates_administered VARCHAR)
### Question:
What was the source of the poll that gave McAuliffe 30% on June 8?
### Answer:
SELECT source FROM table_21535453_1 WHERE terry_mcauliffe = "30%" AND dates_administered = "June 8"