Donald Trump turned out to be wrong, although it may not be tactful to point it out, because the world still needs him to support Ukraine, however grudgingly. But we told him that Vladimir Putin had no interest in making peace, and so it has proved.
President Trump thought he could persuade the Russian leader to cut a deal over Ukraine. That approach might not have been as misconceived as it sometimes seemed. It might have been possible that a combination of appeasement, flattery and strong-man talk would have worked. But Putin has shown that he is not interested in negotiation. His belief in a Greater Russia, and possibly his need to wage a permanent war in order to maintain his grip on power, means that the bloodshed will continue, and even Mr Trump can see where the blame lies.