CREATE TABLE table_20597634_3 (poll_source VARCHAR, scott_mcadams__d_ VARCHAR)

When 30% is scott mcadams (d) percentage how many poll sources are there?
SELECT COUNT(poll_source) FROM table_20597634_3 WHERE scott_mcadams__d_ = "30%"
SELECT COUNT("poll_source") FROM "table_20597634_3" WHERE "30%" = "scott_mcadams__d_"