Chris Matthews: Trump Jr., Ivanka ‘stand as the next dominoes to fall’

MSNBC host Chris Matthews said Monday that Donald Trump Jr.Donald (Don) John TrumpUkraine's top prosecutor says no evidence of wrongdoing by Bidens New financial disclosure forms provide glimpses of Trump's wealth Trump's Doral resort revenue has dropped since presidential campaign: report MORE and Ivanka TrumpIvana (Ivanka) Marie TrumpHouse Intel to probe whether lawyers for Trump family interfered in investigation Trump Jr. subpoenaed after backing out of interviews: report Graham encourages Donald Trump Jr. to plead the Fifth MORE could be "the next dominoes to fall" in special counsel Robert MuellerRobert (Bob) Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE's ongoing investigation.

"The president’s children stand right in the line of Mueller’s investigative progress," Matthews said on "Hardball." "They stand as the next dominoes to fall."

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"Therein lies the problem, where earlier Mueller subjects have given [President] Trump up, these two lack the option to do that. They can hardly testify against their father," he continued. "If the prosecutor will not be stopped and the kids will not fall to him, we see the president’s adult children heading to prison."

Matthews suggested that Mueller could strike a deal where Ivanka Trump and Donald Trump Jr. could walk if President TrumpDonald John TrumpTrump: 'I will not let Iran have nuclear weapons' Rocket attack hits Baghdad's Green Zone amid escalating tensions: reports Buttigieg on Trump tweets: 'I don't care' MORE does the same.

"But what if the prosecutor were to offer the president an alternative?" he said. "What if he were to say he would let the children walk if the old man does the same? That would mean giving up the presidency in exchange for acquittals all around ― not just for himself, but for all his kids.”

Mueller's investigation into Russian election interference and any possible collusion with the Trump campaign has led to criminal indictments against 33 individuals and three entities.

President Trump has repeatedly denounced the probe, often labeling it a “witch hunt.”