The new pastime of Koch-bashing yields results for Democratic candidates; fundraising emails mentioning the brothers outperformed those that did not.

"And here's another reason that the Democrats will keep battering the Kochs. I've seen some numbers from fundraising e-mails from one campaign that were sent from roughly mid-January to mid-March, pretty bad news cycles for the party. Nineteen e-mails didn't mention the Kochs. They raised, in total, $48,146.30, for an average of $2,534.02 per message. But five e-mails mentioned, in at least some way, the Koch brothers. Those asks raised $32,668.72, an average of $6,533.74 per e-mail. The Democratic base, which has been hearing about and fearing the Kochs for nearly four years, responds to this stuff." -- David Weigel, Slate.com