Jason Mattera, editor at Human Events, is well known for his ambush interviews of liberals. And he’s struck again, this time confronting self-admitted socialist Senator Bernie Sanders.

In his new video, Mattera decides to confront Sanders about whether or not Sanders is profiting from his new book, The Speech: A Historic Filibuster on Corporate Greed and the Decline of Our Middle Class. It’s a printing of his eight and a half hour filibuster speech in December decrying the president’s tax deal with Republicans.

In the “Acknowledgements” section of the book, Sanders says his “authorial proceeds” will be donated to a children’s charity. But Mattera wanted to make sure that was true, so he showed up at a recent book signing to ask about it. And while he does ask Sanders about the proceeds, he also asks a very interesting question: will Sanders sign Mattera’s copy of the book to “capitalism, the greatest economic system on earth?”

The answer? No, and then yes — sort of. See below:

To be fair, Sanders conveys the same message to Mattera as he does in the book’s acknowledgements — the money will go to charity. That’s commendable. But in his write-up of the story, Mattera makes an interesting point:

Meanwhile, if Sanders follows through on his pledge, there’s no word on whether or not the Senate’s only (admitted) socialist will use the “donations” to lower his taxable income for 2012.

(H/T: Weasel Zippers)