Charles and David Koch have pledged to spend an astounding $889 million on the 2016 elections. As my colleague Luke Brinker pointed out earlier today, that level of spending is unprecedented, surpassing the dollar amount of any previous campaign cycle. For comparison the Republican National Committee and the GOP’s two congressional committees spent a combined $657 million in 2012 -- $232 million less than the Kochs plan to spend next year.So what’re they buying, exactly?