In spite of his early support for Roosevelt, Coughlin's populist message contained bitter attacks on the Roosevelt administration. The administration decided that although the First Amendment protected free speech, it did not necessarily apply to broadcasting, because the radio spectrum was a "limited national resource" and regulated as a publicly-owned commons. New regulations and restrictions were created to force Coughlin off the air. For the first time, operating permits were required of those who were regular radio broadcasters. When Coughlin's permit was denied, he was temporarily silenced.
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In October 1939, one month after the invasion of Poland, the Code Committee of the National Association of Broadcasters (NAB) adopted new rules which placed "rigid limitations on the sale of radio time to spokesman of controversial public issues". Manuscripts were required to be submitted in advance. Radio stations were threatened with the loss of their licenses if they failed to comply. This ruling was clearly aimed at Coughlin due to his opposition to prospective American involvement in World War II.
Coughlin reasoned that although the government had assumed the right to regulate any on-air broadcasts, the First Amendment still guaranteed and protected freedom of the written press. He could still print his editorials without censorship in his own newspaper, Social Justice. However, the Roosevelt administration stepped in again, this time revoking his mailing privileges[clarification needed] and making it impossible for Coughlin to deliver the papers to his readers. He had the right to publish whatever he wanted, but not the right to use the United States Post Office Department to deliver it.
