There has been a barrage of criticism in the US after President Donald Trump defended Russia over claims of interference in the 2016 elections.
At a summit with Russian President Vladimir Putin in Finland, Mr Trump contradicted US intelligence agencies, saying Russia had no reason to meddle.
The top Republican in Congress, House Speaker Paul Ryan, said Mr Trump must see that “Russia is not our ally”.
The president’s own intelligence chief publicly broke with him.
Russia is responsible for “ongoing, pervasive attempts” to undermine US democracy, Director of National Intelligence Dan Coats said in a statement.
Mr Putin denied the claim.
On Monday the US and Russian presidents held nearly two hours of one-on-one talks without their advisers in the Finnish capital Helsinki .
At a news conference after the summit, he was asked if he believed his own intelligence agencies or the Russian president when it came to allegations of meddling in the election.
“President Putin says it’s not Russia. I don’t see any reason why it would be,” he replied.
Mr Trump also blamed poor relations with Russia on past US administrations rather than Russian actions.