GOP Sen. Jeff FlakeJeffrey (Jeff) Lane FlakeTrump suggests Heller lost reelection bid because he was 'hostile' during 2016 presidential campaign Live coverage: Trump delivers State of the Union Sasse’s jabs at Trump spark talk of primary challenger MORE (Ariz.) blasted President TrumpDonald John TrumpBill Kristol resurfaces video of Pence calling Obama executive action on immigration a 'profound mistake' ACLU says planned national emergency declaration is 'clear abuse of presidential power' O'Rourke says he'd 'absolutely' take down border wall near El Paso if he could MORE minutes after a joint press conference with Russian President Vladimir Putin, calling his rhetoric "shameful."

Trump, during a closely watched press conference with Putin, took a swipe at special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE's probe and said both the United States and Russia were to blame for the current soured state of relations between them.

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"I hold both countries responsible. I think that the United States has been foolish. I think we've all been foolish. ... I think we're all to blame," he told a reporter at the press conference in Helsinki when asked if he held Russia accountable.

Trump also called Mueller's probe a "disaster" and downplayed Russia's meddling in the 2016 election.

Flake is one of several GOP lawmakers who immediately criticized Trump's comments during the press conference.

GOP Sen. Ben SasseBenjamin (Ben) Eric SasseOvernight Health Care: Push for cosponsors for new 'Medicare for all' bill | Court lets Dems defend ObamaCare | Flu season not as severe as last year, CDC says Senate approves border bill that prevents shutdown The Hill's 12:30 Report — Presented by Kidney Care Partners — Lawmakers scramble as shutdown deadline nears MORE (Neb.) called them "bizarre and flat-out wrong."

While GOP Sen. Lindsey GrahamLindsey Olin GrahamGraham seeks new Rosenstein testimony after explosive McCabe interview Senate confirms Trump pick William Barr as new attorney general Graham demands testimony from former FBI acting Director McCabe MORE (S.C.) warned that Trump's rhetoric on election interference could paint the United States as weak and that the summit was a "missed opportunity."

"Missed opportunity by President Trump to firmly hold Russia accountable for 2016 meddling and deliver a strong warning regarding future elections. This answer by President Trump will be seen by Russia as a sign of weakness and create far more problems than it solves," he said in a tweet.

Neither Speaker Paul RyanPaul Davis RyanRubio discovers Native American heritage through TV show Feminine hygiene products to be available to House lawmakers using congressional funds Former Ryan aide moves to K street MORE (R-Wis.) nor Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellBill Kristol resurfaces video of Pence calling Obama executive action on immigration a 'profound mistake' Winners and losers in the border security deal House passes border deal, setting up Trump to declare emergency MORE (R-Ky.) immediately commented.