A former top aide to U.S. Ambassador to Russia Jon Huntsman on Monday told the U.S. envoy to "resign if you have any honor."

John Weaver, who was Huntsman's chief strategist during his 2012 bid for president, tweeted the message at his former boss on Monday following 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's joint press conference with Russian President Vladimir Putin.

@JonHuntsman Resign, if you have any honor. — John Weaver (@JWGOP) July 16, 2018

Trump's remarks at the press conference sparked outrage, including from many members of his own party.

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Viewers around the world reacted with shock as Trump denied Russian interference in the 2016 presidential election, despite the U.S. intelligence community's conclusion that they did.

Trump's remarks came days after special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE indicted 12 Russian intelligence officers for conspiring to interfere by hacking U.S. election systems.

Trump blamed Mueller's investigation for keeping the U.S. and Russia "separated." He repeatedly denied collusion between his campaign and the Kremlin.

Huntsman on Sunday predicted Russian meddling in U.S. elections would be "part of the conversation" between Putin and Trump during their talks in Helsinki on Monday, but he did not offer much detail.

He said there will not be "much of a relationship left" between Moscow and the U.S. if the Kremlin interferes in the 2018 midterm elections.

Huntsman has not commented publicly since Trump's press conference.