Soviet invasions of allies helped destroy the Warsaw Pact – Trump’s dangerous rhetoric risks repeating the mistake inside Nato

Donald Trump’s echoing of Russia’s talking points in its war against Ukraine has long been a cause for alarm and dismay in the west.

Now an even more disturbing Kremlin precedent dating from the cold war is being evoked by the US president’s fixation on taking over Greenland – that of carrying out attacks on military allies.