Robertson was a harsh supporter of the Patriotic Groups organized to fight Communism in the United States. He made a blacklist of books and authors which he deemed to be misleading for the youth, which was used by several schools as a guide to prevent Communist, anti-Christian and immoral views from reaching the students. Robertson also campaigned heavily against Governor Herbert F. Solow and several prominent Democratic figures.
The leftist intellectuals who protested against the Red Scare and the blacklistings, heavily criticized Robertson and his tactics. Lawyer Barack Obama even got into a severe argument with him, during which Robertson claimed he was a "damn, dirty Communist" and should be taken to the Soviet Union where he belongs.