In the Pentagon Papers case the government asserted in the Supreme Court that the publication of the material was a threat to national security. It turned out it was not a threat to U.S. security. But even if it had been that doesn't mean that it couldn't be published.
The hope and change the Democrats had in mind was nothing more than a retread of the failed and discredited socialist policies that have been the enemy of freedom for centuries all over the world. I fear America is teetering towards tyranny.