"We are exerting as much persuasive power as we possibly can" to stop the project through diplomatic means first, she said, but she noted that Congress has given the government authority to impose sanctions on such Russian pipeline projects if necessary.
Economy minister Peter Altmaier defended the Nord Stream 2 pipeline, which is strongly opposed by many East European countries as well as the US, who say that by circumventing Ukraine the pipeline will increase Russia's leverage over countries that rely on Moscow's energy sales.
In early April, after meeting with the leaders of Latvia, Lithuania and Estonia at the White House, Trump criticized the Nord Stream 2 pipeline.
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.
As previously reported "FACTS", the President of Ukraine Petro Poroshenko warned Germany from participating in the construction of the "Nord stream-2", proposing as an alternative to the modernization of the transit pipeline passing through the territory of Ukraine.
"Germany hooks up a pipeline into Russian Federation, where Germany is going to be paying billions of dollars for energy into Russian Federation".
Altmaier has said he is optimistic that a "substantial" amount of gas will flow through Ukraine in the future.
In addition, the United States has threatened to sanction European companies that help build the pipeline.
She said the Baltic was a congested, sensitive military area.
According to sources, the position of the tramp due to a desire to force Russia out of the gas market in favor of its own supplies of liquefied natural gas, as well as wanting to maintain Ukraine's status as a major transit country for Russian gas to Europe.
It added the national permitting procedures in the other three countries along the route - Russia, Sweden and Denmark - are "proceeding as planned".
Gazprom's Western partners are energy companies Uniper, Wintershall, Engie, Austria's OMV and Anglo-Dutch group Shell.