Assad's CBS interview is unlikely to make any difference among the people and policymakers in America.
Much more significant here is the 13 CIA-verified videos, which have just been released, of the chemicals weapons attack on the outskirts of Damascus.
Some of those are extremely harrowing and today those videos are being shown to all members of Congress. That is much more likely to sway opinion.
It is in many ways the secret weapon of the lobbying effort now underway by the White House.