McCain: 'More shoes will drop' in Mueller investigation

Sen. John McCainJohn Sidney McCainMcCain rips Trump for attacks on press NSA spying program overcomes key Senate hurdle Meghan McCain says her father regrets opposition to MLK Day MORE (R-Ariz.) is predicting that special counsel Robert Mueller's investigation into the 2016 presidential election will ensnare more people, saying the "scandal is not over."

"I told you months ago that this was a centipede and shoes would drop, and I guarantee you more shoes will drop," the Armed Services Committee chairman told reporters on Tuesday.

His comments come after Mueller unveiled charges against Paul Manafort, Trump's former campaign chairman, and Manafort's business associate Richard Gates. Former Trump campaign aide George Papadopoulos has also pleaded guilty to making false statements to FBI investigators.

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McCain has repeatedly predicted that "shoes will drop" as part of the investigation into Russia's election interference and potential ties between the Trump campaign and Moscow.

Questioned on what "shoes," or revelations, he expected to result from Mueller's investigation, McCain said he didn't have specific predictions but "they always have and they always will."

"I guarantee you this scandal is not over," he added.

McCain said earlier this year that questions about Russia's election interference and potential collusion was "reaching the point where it's of Watergate size and scale."

But asked on Tuesday if the current investigation was overshadowing the Nixon-era scandal, McCain declined to weigh in, saying he doesn't compare the two.

Monday's charges raised new speculation that Trump could try to fire, or have the Justice Department fire, Mueller. McCain, like many GOP senators,  said he didn't think Trump would force the former FBI director out of his special counsel position.

Asked how the caucus would react if that happened, McCain said: "Everybody that I know does not think that's a good idea."