The Wall Street Journal reports Giuliani Says Trump Doesn't Have to Comply With Mueller Subpoena, Could Invoke Fifth Amendment.

"We don't have to" comply with a possible subpoena for Mr. Trump, Mr. Giuliani said during an appearance Sunday on ABC's "This Week." "I'm gonna walk him into a prosecution for perjury, like Martha Stewart did?" Mr. Giuliani also left open the possibility the president could invoke his Fifth Amendment right to refuse to testify if forced to appear before a grand jury.

Agreeing to a voluntary interview would allow Mr. Trump's lawyers to set conditions, including the length of the interview, the topics raised and whether Mr. Trump could be accompanied by counsel.

"When you volunteer at least maybe you can constrain the questions. When you're subpoenaed, a subpoena is broad. Your lawyer isn't present. This is a tough decision for the president's team to make," Harvard law professor Alan Dershowitz said Sunday on NBC's "Meet the Press.