The murder investigation may well bring Turkey and Russia together, mounting a united front against the U.S. in demanding justice for Ambassador Karlov’s killers.

President Erdoğan will celebrate his deliverance from last night’s coup as a triumph of “democracy”. We need not necessarily join the celebration.

For Moscow, U.S.-Turkish cooperation on Syria fits into a pattern of Western hostility to Russian interests dating back to the 19th century. U.S. and European statesmen should tread lightly.