Prompted by Senate Majority Leader Harry Reid, Democrats spent millions of dollars spotlighting Republican ties to the billionaire conservative megadonors Charles and David Koch. But despite Republicans — and some Democrats — publicly decrying the strategy after Tuesday’s GOP wave as an ineffective waste of money, Reid told allies on election night that he planned to continue hammering the brothers, according to an operative close to him…

Brock’s American Bridge outfit on Thursday began circulating a memo to senior Democratic congressional aides and big money groups making the case for redoubling the effort to make the Kochs into boogeymen.

Titled “Dear Koch Brothers: We Aren’t Going Anywhere,” the memo, obtained by POLITICO from a source who received it, contends that the GOP takeover of the Senate makes it more important — and potentially more effective — to call attention to the Kochs’ influence in the GOP.

“This will be easier now that they are in power,” Brock wrote.