Leaders of both parties in the US Congress have agreed on legislation that allows fresh sanctions to punish Russia for alleged election meddling.
The new legislation would also sharply limit President Donald Trump’s ability to lift any sanctions against Russia.
He has previously said he needs diplomatic leeway with the Kremlin.
Mr Trump’s time in office has been dogged by claims that Russia tried to influence last year’s US election.
Moscow denies any wrongdoing but several US investigations are looking into whether anyone in the Trump campaign colluded with Russian officials.
Correspondents say the bipartisan agreement indicates determination in Congress to maintain a firm line against Russia, whatever Mr Trump’s view.