Since when does the government have this power?

Civil libertarian Gary Reed reports here on the arrest of a man on the grounds that he was distributing literature without a permit, an offense under a Department of Homeland Security regulation.

Since when does the DHS have the power to erase part of the First Amendment?

Wait — I get it now. The paper or ink might have moved in interstate commerce and under the Obama “living Constitution” theory, that makes the distribution of literature a matter of interstate commerce and thus subject to federal control.