Senate Minority Leader Charles Schumer Chuck SchumerCruz blocks amended resolution honoring Ginsburg over language about her dying wish Senate Democrats introduce legislation to probe politicization of pandemic response Schumer interrupted during live briefing by heckler: 'Stop lying to the people' MORE (D-N.Y.) on Saturday compared an argument made by 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 legal team to one that would be valid in a dictatorship.

A letter obtained by The New York Times and published Saturday revealed that Trump's lawyers sent a confidential letter to 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 in January, arguing that the president could not have possibly obstructed justice because he has constitutional authority over all federal investigations.

“This would be a valid legal argument — if our government were a dictatorship,” Schumer tweeted. “Fortunately, we are a government of laws, not men. And in America, no one is above the law, including the president.”

In his tweet, Schumer linked to the The New York Times article that featured the letter. According to the 20-page note, the Constitution gives Trump the broad authority to, "if he wished, terminate the inquiry, or even exercise his power to pardon."

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The letter also said Trump doesn’t have to be interviewed by investigators.

For months, Mueller’s team has been working to get an interview with Trump for his investigation into possible ties between the Trump campaign and Russia. Trump’s lawyers have been reluctant to agree to an interview for fear that the president might incriminate himself.

Mueller has considered subpoenaing Trump for an interview, a possibility Trump’s legal team has been preparing for.

The president has repeatedly stressed that his campaign did not collude with the Russians during the 2016 presidential election and has called for Mueller’s investigation to end on numerous occasions, dubbing the probe a "witch hunt."