killary
Another rather Jaw-Dropping release within the latest WikiLeaks document dump of DNC emails outlines the planning for a joint fundraiser in September 2015.

Apparently, The Washington Post was hosting a party. The DNC saw the opportunity to make a fundraiser out of it and sell tickets to the party to donors. However, the email chain shows the lawyers for the DNC said they can't publish the price for the tickets because the joint event would be illegal.

The Washington Post and DNC still held the joint event, they just never left a traceable paper trail (to outsiders) showing their combined efforts:
wiki links

Great - we were never going to list since the lawyers told us we cannot do it.

We are waiting

Jordan Kaplan
National Finance Director
Democratic National Committee
(202) 488-5002 (o) | (312) 339-0224 (c)
kaplanj@dnc.org
On Sep 22, 2015, at 11:25 AM, Rangappa, Anu wrote:

They aren't going to give us a price per ticket and do not want their party to be listed in any package we are selling to donors. If we let them know we have donors in town who will be at the debate, we can add them to the list for the party.