Sen. Jeff Flake Jeffrey (Jeff) Lane FlakeHow fast population growth made Arizona a swing state Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Republican former Michigan governor says he's voting for Biden MORE (R-Ariz.) on Friday became the second Republican senator to break with President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE for saying that Russia should be invited back into the G-7, an influential group of Western economic powers and Japan.

“No, Russia should not be added to the G-7,” Flake wrote on Twitter, after Trump said Russia should again be a part of the group from which it was suspended in 2014.

No, Russia should not be added to the G-7. — Jeff Flake (@JeffFlake) June 8, 2018

Moments before, Sen. Ben Sasse Benjamin (Ben) Eric SasseTrump says he'll sign order aimed at protecting premature babies in appeal to religious voters Government watchdog recommends creation of White House cyber director position Chamber of Commerce endorses McSally for reelection MORE (R-Neb.) slammed Trump’s suggestion to reinstate Russia as a "weak" move.

ADVERTISEMENT

“Putin is not our friend and he is not the president’s buddy. He is a thug using Soviet-style aggression to wage a shadow war against America, and our leadership should act like it,” said Sasse, referring to Russian President Vladimir Putin.

Flake and Sasse are two of Trump's most frequent intraparty critics.

Trump caused waves before departing for the summit in Quebec by telling reporters at the White House that Russia should be at the negotiating table.

“Why are we having a meeting without Russia being in the meeting?” Trump told reporters at the White House before departing for the meeting.

“I would recommend — and it’s up to them, but Russia should be in the meeting, it should be a part of it," he said. “Whether you like it or not, and it may not be politically correct, but we have a world to run.”

Russia was excluded from the group after it annexed Crimea, something that Western allies condemned as a brazen violation of international law.

Democrats also criticized Trump’s statement.

“President Trump is turning our foreign policy into an international joke, doing lasting damage to our country, without any rhyme or reason,” said Senate Democratic Leader Charles Schumer Chuck SchumerCruz blocks amended resolution honoring Ginsburg over language about her dying wish Senate Democrats introduce legislation to probe politicization of pandemic response Schumer interrupted during live briefing by heckler: 'Stop lying to the people' MORE (N.Y.).

Senate Democratic Whip Dick Durbin Richard (Dick) Joseph DurbinFeinstein 'surprised and taken aback' by suggestion she's not up for Supreme Court fight Grand jury charges no officers in Breonna Taylor death Democrats shoot down talk of expanding Supreme Court MORE (Ill.) contrasted Trump’s friendly treatment of Putin to his sharp-elbowed negotiations with Canada, Mexico and the European Union on trade.

“Now watch President Trump grovel at the feet of our adversary and punish our strongest allies,” Durbin tweeted.