This reads like a Breitbart prank, but the Republicans forwarded me a letter, apparently  from the Koch company to Democratic Senatorial Campaign Committee Chair U.S. Sen. Patty Murray (D-WA), showing that Murray evidently tried to raise money from Koch. Here's a Murray voice mail linked in the letter. (Footnote: It's a touch generic-sounding, with no mention of Koch.)

You've heard of Koch. They're the bogeyman of the left, the deep-pocketed backers of the Tea Party.

The Koch executive was amazed to get the fundraising letter from the DSCC and the follow-up call from Murray. Here's what they evidently (the letter is not dated) wrote her:

Senator Patty Murray, Chair
Democratic Senatorial Campaign Committee

Dear Senator Murray:

For many months now, your colleagues in the Democratic Senatorial Campaign Committee leadership have engaged in a series of disparagements and ad hominem attacks about us, apparently as part of a concerted political and fundraising strategy. Just recently, Senator Reid wrote in a DSCC fundraising letter that Republicans are trying to “force through their extreme agenda faster than you can say ‘Koch Brothers.’”

So you can imagine my chagrin when I got a letter from you on June 17 asking us to make five-figure contributions to the DSCC. You followed that up with a voicemail indicating that, if we contributed heavily enough, we would garner an invitation to join you and other Democratic leaders at a retreat in Kiawah Island this September.

I’m hoping you can help me understand the intent of your request because it’s hard not to conclude that DSCC politics have become so cynical that you actually expect people whom you routinely denounce to give DSCC money.

It is troubling that private citizens taking part in the discourse have become the targets of White House and DSCC fundraising missives, and we would certainly encourage you to rethink that approach. Ultimately, I expect voters will see through that and will weigh the issues on the merits alone. But in the meantime, if you could provide me some insight on what exactly you are asking of us and why, I would be most grateful.

Sincerely,
Philip Ellender
President, Government & Public Affairs
Koch Companies Public Sector, LLC

I've got a call in to Sen. Murray's office and a call in to Koch to check on the authenticity of the fundraising gambit.