Washington (CNN) President Donald Trump reacted to the news that Michael Cohen pleaded guilty to making false statements to Congress about the Russia investigation, calling his former lawyer "very weak."

"He's a weak person," Trump told reporters on the White House South Lawn before departing for Buenos Aires, Argentina.

"He was convicted with a fairly long-term sentence with things unrelated to the Trump Organization," Trump said, citing Cohen's legal issues with mortgages and the IRS.

Trump speculated that "what he's trying to do is get a reduced sentence."

Cohen is scheduled to be sentenced next month in a separate case where he pleaded guilty to violating campaign finance laws to help Trump win the presidency by suppressing stories about Trump's alleged affairs. He also admitted that he lied on his taxes, and for those crimes he likely faces three to five years in prison, according to his earlier plea agreement.

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