If Prime Minister Benjamin Netanyahu is a liar, then, they are many Presidential liars in the world including those that made the comment. The word 'lie' is associated with Politicians, so there is no saint or a virgin in the political circle. I guess respect must be shown to another President Prime Minister even in private conversations.
U.S. Senate blocks Republican move to defund Planned Parenthood (Reuters)
from the article: ADL 'deeply disappointed' by Sarkozy-Obama exchange on Netanyahu