Moscow (CNN) Two years ago, Russian legislators celebrated with champagne on the floor of parliament, after Donald Trump emerged victorious in the US presidential elections. Now, they're likely feeling the hangover, as early hopes for a better relationship between Moscow and Washington grow dim.

"Reckless" and "insane" were the Kremlin's words of choice for a current push among US lawmakers to pass new Russia sanctions. In a strongly worded rebuke, Kremlin spokesman Dmitry Peskov on Thursday described the threat of new sanctions as "racketeering" and warned of "harmful consequences" if they are ever passed.

"We consider this unacceptable and believe that such actions could go against the universally recognized rules of international trade," Peskov said.

The outburst came after a bipartisan group of US senators introduced a bill to impose stringent sanctions on Russia over its meddling in US elections and aggression against Ukraine.

The sanctions would target Russian banks, the cyber sector, sovereign debt, and individuals. The bill would also impose strict measures on Russia's lucrative oil and gas sector -- where global energy companies are heavily invested.

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