He goes on to say that he's worked hard to be a better person. But he also maintains his innocence, and blames his legal problems on "a liberal organization, CREW."
"I have been accused of things I absolutely did not do," he writes.
He then asks for donations up to $10,000, noting that lobbyists and foreign officials are not allowed to donate.
Ensign is being investigated by the Senate ethics committee for potentially breaking the rules by setting up a former staffer with a lobbying gig. Ensign has admitted to an affair with the staffer's wife, and to having his parents pay the couple $96,000 after they left his employ. The DOJ is also investigating.