There are several parallels between my testimony before Congress in 1973, about President Richard Nixon and his White House, and Michael Cohen’s testimony t his week about President Trump and his business practices. Setting aside the differences regarding how we got there, we both found ourselves speaking before Congress, in multiple open and closed venues, about criminal conduct of a sitting president of the United States. This is not a pleasant place to be, particularly given the presidents involved.

There are some differences: Unlike Mr. Cohen, who testified in public for a day, I testified for five days. His prepared statement was about 4,000 words; mine was some 60,000 words. Nielsen reports over 16 million people watched his testimony. I am told over 80 million people watched all or part of mine.

Polls varied widely after my testimony. One said 50 percent of Americans believed me, 30 percent did not, and 20 percent were not sure. Another poll had 38 percent believing the president, who denied my statement, and 37 percent believing me. The instant polls on Mr. Cohen’s testimony vary by party affiliation, as was the case with my polls. But 35 percent found him credible. I believe that number will grow.

While my testimony was eventually corroborated by secret recordings of our conversations made by Mr. Nixon, before that it was other witnesses who made the difference. I was surprised by the number of people who surfaced to support my account. The same, I suspect, will happen for Michael Cohen. The Mafia’s code of omertà has no force in public service. I have heard no one other than Roger Stone say he will go to jail for Donald Trump.