The EU (and Germany in particular) really have been breathtakingly naive in terms of their over-reliance on Russia. Trump got a lot of things wrong but he was absolutely right about this:
President Donald Trump has signed a law that will impose sanctions on any firm that helps Russia's state-owned gas company, Gazprom, finish a pipeline into the European Union.
The sanctions target firms building Nord Stream 2, an undersea pipeline that will allow Russia to increase gas exports to Germany. The US considers the project a security risk to Europe.
Both Russia and the EU have strongly condemned the US sanctions.
The Trump administration fears the pipeline will tighten Russia's grip over Europe's energy supply and reduce its own share of the lucrative European market for American liquefied natural gas.
President Trump has said the 1,225km (760-mile) pipeline, owned by Russia's Gazprom, could turn Germany into a "hostage of Russia".
www.bbc.co.uk/news/world-europe-50875935