Since the NATO summit, Trump has gone through a diplomatic massacre way

We do not know what Donald Trump and Vladimir Putin agreed to in their two-hour private conversation. But the praise that Trump dedicated to the former KGB in public was incredible.

The US president ended the joint press conference – the most obsequious spectacle ever made by an American president to a Russian counterpart – shouting "a true witch hunt" (in reference to the 39, investigation of the Russian interference in the US elections) while leaving the room. He started and ended domestic politics.

When asked if Russia was partly responsible for the decline of relations Trump replied, "I think (Robert) Mueller's search is a disaster for our country. "He did not mention the annexation of Crimea by Russia, the poisoning of British citizens on British soil or the fact that Trump's own intelligence chief compared Russian cyber attacks with the times preceding the 9/11 attacks.

Michael Hayden, a former director of the CIA, said that the grunts of the CIA, the State Department and the FBI were undoubtedly audible. The others were not so nice. John Brennan, another former director of the CIA, tweeted that Trump's behavior was "completely treacherous."

Although the chances of Trump's dismissal are still low, put the Western world into an existential crisis . It was only last Wednesday that he arrived in Brussels for the NATO summit. Since then, he has traveled the path of the diplomatic massacre with the closest allies of the United States.

He accused Angela Merkel the German Chancellor, of being "captive" of Russia. He described the European Union as a main "enemy" of the United States. He weakened the position of Theresa May Prime Minister of Great Britain, during a working visit to the United Kingdom. But he lavished only praise on the autocratic leader of Russia. Only Putin escaped Trump's criticism. The results of Trump's five-day trip are a NATO in crisis and a real restart of US-Russian relations, all in favor of Putin.

What will happen next? The first concern is the preparation of NATO. The key principle of this body is that an attack against one of its members is an attack against all.

Article 5 of NATO aims to deter potential adversaries. Nobody knows what Trump said to his Russian counterpart privately. But it is likely that Putin is very encouraged by the events of last week. What are the chances that Trump will come to the aid of a Baltic country if Putin launches one of his hybrid wars? What are the chances that Putin is stepping up cyberattacks against democracies like Germany and the United Kingdom and, of course, the United States?

Trump left NATO wondering if he really has a partner on the other side of the Atlantic. It offers Russia the equivalent of an "empty purpose".

The second concern is the longevity of Mueller's research. Most of Trump's answers to direct questions about Russia's interference in the US elections were complaints about national criticism, from the Democratic Party to Mueller's team and the media. But he said that he had received very strong rejections from Putin, as well as a "very interesting idea" of US-Russian collaboration to investigate allegations of electoral interference.

It is difficult to exaggerate the irony of Putin's suggestion. Similarly, it is difficult to compare anything to the fact that an American president doubts the word of his own intelligence agencies, while standing beside the main geopolitical opponent of the United States. The future of the Western alliance is now seriously questioned. Trump made it so.