Senate Democrats
as far as it being "the truth" it was obviously a "limited hang-out" cuz he sure didn't want a careful investigation revealing the break-ins he was conducting himself.
He could have contacted a US District Attorney and offered to provide testimony to a grand jury, or if he didn't think any of them would be receptive, he could have contacted Democrats in Congress.
The Democrats controlled Congress, and they would have gladly heard testimony that would have helped bring Nixon down.
Felt played it very coyly, orchestrating it so that the media brought Nixon down. It worked. His political agenda to destroy Nixon worked, probably better than his legal alternatives would have.
But in doing so, he made himself no better than the people he was fingering. Two wrongs don't make a right unless it involves attacking a Republican.