Oddly, now that we know that all parties to the “conversation” have denied it, we will stop saying it happened, because we are sane people.
The DNC didn’t need to issue ANY letters, they simply had to get Howard and Selebius to make statements denying the conversation. That simple.
Of course, the lefties the DNC works with never drop lies when they are proven false, so maybe they are just used to having to sue people to get them to clam up.
You are assuming the law suit threat didn't have an affect. It is quite possible Brownback said some things that he doesn't want repeated. A lawsuit would mean discovery.