JIM GERAGHTY: Koch Network Prepping ‘Largest Investment Ever’ in Midterm Cycle.

Speaking to reporters at the opening session of the Koch Seminar Network’s winter meeting, Phillips said he foresees a “very challenging environment at both the federal and state level to protect the policy majorities that made these victories possible.” (The group is eager to avoid being perceived as partisan, and thus emphasizes its preferred lawmakers as “policy majorities.” The overwhelming majority of political figures the Koch network and AFP supports are free-market conservative or libertarian-leaning Republicans.)

To deal with that challenging environment, the Koch network is prepared to spend a sum “on the high end” of $300 million to $400 million, according to James Davis, a spokesman for the network.

Phillips called that “the largest investment we’ve ever had in a midterm election. To give you a sense of that, that is 60 percent more than we [spent] in the in 2016 presidential cycle.”

That’s yuge, even in a non-off year election.