Mr Tusk has changed his tune since he visited China in July last year
And he says he's willing and ready to get round the table and talk to Donald Trump about trade as he fires off a warning to China over aggression.
Ahead of a conference in Malta this week, the Polish politician who earns £22,000 a month, also admitted the EU is facing an unprecedented dangerous crisis in a letter to heads of state.
And he has slammed the issue of terror and anarchy in the Middle East and Africa insisting radical Islam is "playing a major role".
Mr Tusk referenced China's naval operations in his letter to heads of states
The challenges currently facing the European Union are more dangerous than ever before in the time since the signature of the Treaty of Rome
Seemingly appearing to echo Donald Trump's concerns with an increased Chinese military presence in the South China Sea, Mr Tusk has called on the EU to put on a united front.
He said: "The challenges currently facing the European Union are more dangerous than ever before in the time since the signature of the Treaty of Rome.
"Today we are dealing with three threats, which have previously not occurred, at least not on such a scale.
Donald Trump has signalled he's ready to walk away from trade talks
"The first threat, an external one, is related to the new geopolitical situation in the world and around Europe.
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"An increasingly, let us call it, assertive China, especially on the seas, Russia's aggressive policy towards Ukraine and its neighbours, wars, terror and anarchy in the Middle East and in Africa, with radical Islam playing a major role, as well as worrying declarations by the new American administration all make our future highly unpredictable.
"For the first time in our history, in an increasingly multipolar external world, so many are becoming openly anti-European, or Eurosceptic at best. Particularly the change in Washington puts the European Union in a difficult situation; with the new administration seeming to put into question the last 70 years of American foreign policy."
Relations appeared to be cordial last July before the US elections
One of the first decisions Mr Trump made when he entered the Oval Office was to declare the Trans-Pacific Partnership (TPP), a trade deal between 12 countries, as defunct.
It raised fears that the US President could also scrap the European American trade deal known as Transatlantic Trade and Investment Partnership (TTIP).
Mr Trump's administration have said they are more interested in forming bilateral agreements after TPP was ripped to shreds.
And now Mr Tusk, 59, says it's time for the EU to look at entering discussions – should America agree in order to continue as a "trade superpower".
Donald Tusk visited China last year for the G20 summit
He added: "We should use the change in the trade strategy of the US to the EU's advantage by intensifying our talks with interested partners, while defending our interests at the same time.
"The European Union should not abandon its role as a trade superpower which is open to others, while protecting its own citizens and businesses, and remembering that free trade means fair trade.
"We should also firmly defend the international order based on the rule of law.
"We cannot surrender to those who want to weaken or invalidate the Transatlantic bond, without which global order and peace cannot survive. We should remind our American friends of their own motto: United we stand, divided we fall."
In a bizarre statement he also called upon member states leaders to remind the public to embrace their "European pride" before going on to add that the bloc is facing an integrity issue.
He added: "Let us show our European pride.
"If we pretend we cannot hear the words and we do not notice the decisions aimed against the EU and our future, people will stop treating Europe as their wider homeland.
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Armed police officers and soldiers of a frontier inspection station drill in the snow on December 21, 2016 in Heihe, Heilongjiang Province of China
"Equally dangerously, global partners will cease to respect us.
"Objectively speaking, there is no reason why Europe and its leaders should pander to external powers and their rulers.
"I know that in politics, the argument of dignity must not be overused, as it often leads to conflict and negative emotions.
"But today we must stand up very clearly for our dignity, the dignity of a united Europe – regardless of whether we are talking to Russia, China, the US or Turkey.
"Therefore, let us have the courage to be proud of our own achievements, which have made our continent the best place on Earth. Let us have the courage to oppose the rhetoric of demagogues, who claim that European integration is beneficial only to the elites, that ordinary people have only suffered as its result, and that countries will cope better on their own, rather than together."