The commission says that the sanctions package passed by the U.S. House could affect European Union companies working on Russian pipelines that bring fuels like oil and gas to Europe.
Trump's presidency has been dogged by questions his campaign's ties with Russian Federation and his pre-election promises to improve relations with Moscow.
Signing a bill that penalizes Russia's election interference would mark a significant shift for Trump.
Juncker said the bill could have "unintended unilateral effects" on the EU's energy security. The restrictions, which come as part of a bill imposing sweeping sanctions also on Iran and North Korea, target Russia's major defense, mining, shipping and railway industries. The legislation strips him of his power to remove sanctions on his own, instead requiring some consent by Congress.
Freshly minted White House press secretary Sarah Huckabee Sanders said Sunday morning on ABC that the president supports the compromise bill.
What does the bill do?Jimmy Duncan (Tenn.) and Thomas Massie (Ky.) - voted against the bill, which passed 419-3.
The sanctions on Russian Federation were drawn up in part to further punish its annexation of Crimea from Ukraine in 2014. Russian President Vladimir Putin also warned that any new sanctions on Russia will only result in the deterioration of US-Russia relations. And, of course, how long until Russia expels some 30 United States diplomats now that it is abundantly clear the U.S. won't return the seized Russian diplomatic compounds as Putin has been demanding in recent weeks.
"The measures risk breaking the transatlantic and G7 unity", the European Commission said in the note seen by Politico.eu.
A document note prepared for an EC meeting on Wednesday seen by the daily, states that the European Union "should stand ready to act within days" if the U.S. measures were "adopted without European Union concerns being taken into account".
In a harshly-worded statement, Jean-Claude Juncker, president of the European Commission, lashed out at Washington saying "America first can not mean that Europe's interests come last". It is unclear what sort of action he is proposing.
Restrictions against Russian Federation come as part of the Countering Iran's Destabilizing Activities Act, targeting not only Tehran, but also North Korea.
This version of the legislation still needs to be approved by the US Senate, but it is not yet clear when it will consider the bill. "And President Trump can not cope with his Congress". In an interview with The Wall Street Journal on Tuesday, the president said he hasn't yet decided whether to sign the legislation into law.
However, aides and members of Congress from both parties say that if Trump does decide to veto it, there will be sufficient votes to override the veto and enact the bill into law.
The House of Representatives is expected to vote on the controversial sanctions bill on Tuesday.
Trump has repeatedly said he wants to improve ties with Moscow, triggering bipartisan concern in Congress that he could lift or ease sanctions against Russian Federation. However, at this stage the text only provides for sanctions imposed in consultation with United States allies.
While President Donald Trump criticized over the weekend the "phony" investigation into his campaign's contacts with Russian officials while running for office, Congress struck a deal to finally punish Russia for the alleged meddling in the 2016 presidential election.
Washington and Brussels continued synchronised Russian policy in response to the Ukraine conflict until Donald Trump took over the White House earlier this year.
The Kremlin continues to insist it did not interfere in the USA elections.
"OMV in general will act in accordance with its contractual obligations and in full compliance with possible new applicable sanctions", the company's spokesperson said.