"They are looking for markets, which we can understand, and they can land it here easily", he said.
Jens Mueller, a spokesman for Nord Stream 2, dismissed concerns from the USA and several European countries, saying the new pipeline would merely be one of many sources of natural gas for Europe.
Oudkirk told reporters the US Congress had given the president new authority to impose sanctions against a variety of Russian pipeline projects.
In the German Lubmin began the construction of a gas receiving station within the project of the pipeline "Nord stream-2".
He added that Europe would respond firmly to US attempts to place its own economic interests before those of partners.
"Does he agree that there appears to be no economic justification for this, but it is instead a political project created to increase European dependence on Russian gas and to weaken Ukraine and will he press that point on our allies, particularly Germany and Denmark?"
The US threats to Nord Stream 2, which has split eastern and western European Union states, could impact companies in Austria, France, Germany and the Netherlands.
"Germany is not doing anything against the interests of Ukraine".
German Chancellor Angela Merkel said today (10 April) that plans for a controversial second underwater pipeline to bring gas from Russian Federation could not go forward without Ukrainian involvement in overland transit.
Mr Johnson responded: "I can assure him that we in the UK Government are well aware of the deep controversy surrounding Nord Stream 2 and we raise it not just in Ukraine but of course with our European friends and partners". It has an annual capacity of 55 billion cubic metres (1.9 trillion cubic feet), but its capacity is planned to be doubled to 110 billion cubic metres (3.9 trillion cubic feet) by 2019, by laying two additional lines.