"Whoever, when the United States is at war, shall wilfully make or convey false reports or false statements with intent to interfere with the operation or success of the military or naval forces of the United States, or to promote the success of its enemies, or shall wilfully make or convey false reports or false statements, or say or do anything except by way of bona fide and not disloyal advice to an investor or investors, with intent to obstruct the sale by the United States of bonds or other securities of the United States or the making of loans by or to the United States, and whoever, when the United States is at war, shall wilfully cause, or attempt to cause, or incite or attempt to incite, insubordination, disloyalty, mutiny, or refusal of duty, in the military or naval forces of the United States, or shall wilfully obstruct or attempt to obstruct the recruiting or enlistment service of the United States, and whoever, when the United States is at war, shall wilfully utter, print, write or publish any disloyal, profane, scurrilous or abusive language about the form of government of the United States, or the Constitution of the United States, or the military or naval forces of the United States, or the flag of the United States, or the uniform of the Army or Navy of the United States, or any language intended to bring the form of government of the United States, or the Constitution of the United States, or the military or naval forces of the United States, or the flag of the United States, or the uniform of the Army or Navy of the United States into contempt, scorn, contumely, or disrepute, or shall wilfully utter, print, write or publish any language intended to incite, provoke or encourage resistance to the United States or to promote the cause of its enemies, or shall wilfully display the flag of any foreign enemy, or shall wilfully, by utterance, writing, printing, publication or language spoken, urge, incite or advocate any curtailment of production in this country of any thing or things, product or products, necessary or essential to the prosecution of the war in which the United States may be engaged, with intent by such curtailment to cripple or hinder the United States in the prosecution of the war, and whoever shall wilfully advocate, teach, defend, or suggest the doing of any of the acts or things in this section enumerated, and whoever shall, by word or act, support or favor the cause of any country with which the United States is at war or by word or act oppose the cause of the United States therein, shall be punished by a fine of not more than $10,000 or imprisonment for not more than twenty years, or both." ... There you have both pieces of legislation. On the one hand, the Constitution provides immunity, and on the other hand, the Espionage Act provides a penalty for the expression of opinion.