U.S. President Joe Biden said last week just such an invasion was “a distinct possibility” sometime in February. NATO and Washington have rejected Moscow’s demands outright but have offered further talks on issues such as disarmament pacts and establishing rules for staging military exercises.

The contents of replies from the United States and NATO were not disclosed. But Secretary of State Antony Blinken has said Washington had made clear its “core principles” and could not accept any notion of a Russian veto on NATO membership and on the choice of alliance partners to be made by Ukraine.

Armenia has dropped its opposition to the project – on grounds that a “corridor” would imply extra-territorial status -- and is now actively moving forward with it.

The EU should respond to the Russian threat to Ukraine by making use of its main strength – economic influence. There is no other way for the union to persuade the great powers struggling over Europe’s future that it is a force to be reckoned with.