The Koch brothers, David and Charles, aren’t particularly identified with Chicago yet except as archenemies of our favorite son, Barack Obama. That might change. They may soon take over one of our local institutions, the Tribune.

Those who fear the worst are fearing it increasingly noisily. The Newspaper Guild and its parent Communication Workers of America just issued a statement calling on the Tribune Company to publicly pledge that “they’ll only sell to a buyer that will protect the objectivity of the news product.” Said the unions: “Recently you’ve seen many petitions asking that the Koch brothers not be allowed to buy the Tribune Company’s newspapers. We understand why the Kochs breed this distrust. They are active political proponents of harsh right-wing positions. We’re also not certain that Tribune will listen to anything but money when the final decision is made.”