When 30% is scott mcadams (d) percentage how many poll sources are there?
CREATE TABLE table_20597634_3 (
    poll_source VARCHAR,
    scott_mcadams__d_ VARCHAR
)
SELECT COUNT(poll_source) FROM table_20597634_3 WHERE scott_mcadams__d_ = "30%"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: When 30% is scott mcadams (d) percentage how many poll sources are there? ### Input: CREATE TABLE table_20597634_3 (
    poll_source VARCHAR,
    scott_mcadams__d_ VARCHAR
) ### Response: SELECT COUNT(poll_source) FROM table_20597634_3 WHERE scott_mcadams__d_ = "30%"