Harvard Law School professor emeritus Alan Dershowitz said Tuesday that President Donald Trump risks facing a Congress controlled by Democrats if he fights any subpoena from Russia special counsel Robert Mueller.
"Since he is the president, the courts will allow him to defer, and ultimately to the Supreme Court, which is more than a year," Dershowitz told Anderson Cooper on CNN.
"But that gets him to a time when Congress is controlled by the Democrats.
"He will lose enough that he will have to give some testimony under the worst of circumstances — without his lawyer being there, with no restrictions," Dershowitz said. "He will have to at least provide some answers."
The Washington Post reported Tuesday that Mueller raised the possibility of subpoenaing Trump to appear before a grand jury if the president did not agree to sit for an interview.
The suggestion came after Trump's lawyers argued the president was not obligated to speak with investigators in the Russia probe.
Dershowitz added President Trump might have waived executive privilege on some aspect of the Moscow investigation because of his tweeting.
"He may have waived some executive privilege," he told Cooper.
"If you tweet and go public and you say things, and then say: 'Oh, I won't answer questions about that because I have executive privilege,' there is a concept of a waiver."
But, Dershowitz added: "The president may have in advertently waived some of his executive privilege by tweeting.
"That can come back to bite him."
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