Breach of protocol. “Americans do not bow to foreign monarchs because that act signified the monarch’s power over his subjects.”
“Obama bows down to Saudi King (updated),” by Clarice Feldman at The American Thinker, April 2 (thanks to Doc Washburn):
[…] See Miss Manners on the protocol. Americans do not bow to foreign monarchs because that act signified the monarch’s power over his subjects.