Why does Donald Trump almost systematically support Vladimir Putin, particularly on Ukraine? Is it held? During his presidency, did he betray for the benefit of the Kremlin? And why has the Republican Party changed its positions on Russia? To answer these questions is to try to shed light on a labyrinthine operation of espionage and manipulation. It began forty years ago, in the last years of the Cold War. Donald Trump was then just a real estate developer and Vladimir Putin a young KGB agent. This operation still has gray areas, but some hold pieces of this puzzle. A former KGB leader, infiltrated “illegals”, a former Trump advisor, former CIA and FBI officials, a former prosecutor testify. This gripping investigative documentary, shot like a spy film, plunges us into the heart of Soviet and then Russian infiltrations in the United States, revealing the ambitions of President Putin and his thirst for revenge. As the 2024 US elections approach, Russian interference in US politics – through spies or agents of influence – is a worrying reality. Putin is now counting on Trump’s victory to weaken US support for Ukraine and pave the way for a Russian victory.