From a reader:

I enjoyed your recent Corner post about Bill Moyers. You may have received this from other readers, but Judge Larry Silberman had an op-ed in the Wall Street Journal a few years back about this very issue. Here’s the money quote:
Only a few weeks before the 1964 election, a powerful presidential assistant, Walter Jenkins, was arrested in a men’s room in Washington. Evidently, the president was concerned that Barry Goldwater would use that against him in the election. Another assistant, Bill Moyers, was tasked to direct Hoover to do an investigation of Goldwater’s staff to find similar evidence of homosexual activity. Mr. Moyers’ memo to the FBI was in one of the files. When the press reported this, I received a call in my office from Mr. Moyers. Several of my assistants were with me. He was outraged; he claimed that this was another example of the Bureau salting its files with phony CIA memos. I was taken aback. I offered to conduct an investigation, which if his contention was correct, would lead me to publicly exonerate him. There was a pause on the line and then he said, “I was very young. How will I explain this to my children?” And then he rang off. I thought to myself that a number of the Watergate figures, some of whom the department was prosecuting, were very young, too.
In other words, Moyers didn’t just use the FBI to dig up dirt on the sex lives of fellow members of the Johnson Administration. He used the FBI to dig up dirt on the sex lives of the president’s chief political rivals. Notice also that Moyers’s memory was a lot clearer back in the 70s than he admits today; he didn’t have any problem recalling his involvement back when Larry Silberman was Deputy Attorney General.

Peter Wehner has more on Moyers over at Commentary that’s worth checking out as well.