Chancellor Angela Merkel has repeatedly said the pipeline is a purely private business concern
US Secretary of State Mike Pompeo on Friday issued a stark warning against China and Russia on the eve of the 30th anniversary of the fall of the Berlin Wall.
"Western, free nations have a responsibility to deter threats to our people" from governments like China, Russia and Iran, Pompeo said, speaking just a few metres away from where the Wall ran past the German capital's world-famous Brandenburg Gate.
The US and its allies should "defend what was so hard-won... in 1989" and "recognize we are in a competition of values with unfree nations," he added.
Picking at sore spots in Washington's relationship with Berlin, Pompeo said the under-construction Nord Stream 2 gas pipeline from Russia to Germany would mean "Europe's energy supplies… depend on [Russian President Vladimir] Putin's whims".
Chancellor Angela Merkel has repeatedly said the pipeline is a purely private business concern.
And he warned of "Chinese companies' intent to build 5G networks," after the German government failed to exclude tech giant Huawei from the bidding process for the next-generation mobile network infrastructure.
Pompeo is on a whirlwind two-day tour of Germany where he has revisited the site of his Cold War military service on the former Iron Curtain border and is slated to meet leaders including Merkel.
While in Europe, he has looked to shore up transatlantic relations eroded by trade conflicts and discord over geopolitical crises and military spending.
Spurred by the US leaving the way open to Turkish and Russian military action in northern Syria, France's President Emmanuel Macron told The Economist this week that the North Atlantic Treaty Organization (Nato) alliance – of which Ankara is also a member – was suffering a "brain death" of lack of coordination between Europe and Washington.
Recalling past "challenges between partners" within Nato, including France's 1960s departure from the alliance's command structure, Pompeo on Friday dismissed the debate around Macron's comments as a "kerfuffle".
Other leaders including Merkel, Nato Secretary-General Jens Stoltenberg and Canadian Prime Minister Justin Trudeau have also firmly rejected Macron's assessment.