Think Progress reporter Lee Fang interviewed David Koch in a sidewalk ambush last year.

Boy, the apple didn't fall far from the tree, huh? What a swell family those Kochs are:

Billionaire David Koch has vowed to defend Wisconsin governor Scott Walker against the union-backed recall election underway in that state. In aninterview with the Palm Beach Post, Koch said that, “We’ve spent a lot of money in Wisconsin. We’re going to spend more.”

The we in question is Koch and his equally well-off brother Charles, who together have financed much of the conservative tea party movement through their group Americans For Prosperity.

Koch also told the Post that “there will be no stopping union power” if they win the recall election versus Walker, who jammed through legislation that strips public employee unions of their power to collectively bargain.

In the interview, Koch lavishes praise on his father Fred Koch who was a founding member of the far-right John Birch Society.

Fred Koch once wrote that the “colored man looms large in the Communist plan to take over America” and claimed welfare was designed to create a “vicious race war.”

The John Birch Society was founded in opposition to the civil rights movement, and promoted numerous conspiracy theories of a UN-led “one world” government. The group also famously opposed fluoridation of water, which it described as a communist mind-control plot.