Once again, President Barack Obama is being criticized for bowing when he met a foreign leader.

Sky News posted video of the president's gesture as he arrived for a meeting Saturday with Japan's Emperor Akihito and Empress Michiko:

The White House told Politico that the president was observing protocol.

ABC News' Jake Tapper ran the bow past "an academic with expertise about the Japanese Empire, and in general a supporter of President Obama" who said it is not unprecedented for an American president to bow when meeting a Japanese emperor (Nixon did so in 1971), but that Obama's much deeper bend was too low.

From the right, conservative blogger/commentator Michelle Malkin asks "Crikey, is there a single adult in the White House who can teach the commander-in-chief some presidential protocol?"

Also from the right, Scott Johnson at the conservative Power Line blog says:

Obama's breach of protocol is of a piece with the substance of his foreign policy. He means to teach Americans to bow before monarchs and tyrants. He embodies the ideological multiculturalism that sets the United States on the same plane as other regimes based on tribal privilege and royal bloodlines. He gives expressive form to the idea that the United States now willingly prostrates itself before the rest of the world. He declares that the United States is a country like any other, only worse, because we have so much for which to apologize.

Earlier this year, Obama bowed upon meeting Saudi King Abdullah Bin Abdul Aziz al Saud.

We'll keep this open for 24 hours:

(Keep in mind: This is an unscientific survey.)