If he was "lied" to and passes on that "lie" unknowingly, is he then a "liar"?  

What does the United States of America gain by him admitting he was wrong?

Honesty in international politics is rare on a good day between allies.  Why do we tap other Presidents and Chancellors and leaders phones when they are out allies?

There is an old saying in international diplomacy and in warfare, "If you aren't cheating, you aren't trying hard enough!"