General Motors defends racism charges against CEO Mary Barra by Black media owners

General Motors CEO Mary Barra will hold a series of meetings with Black-owned media outlets after their owners alleged in a newspaper ad that the automaker was racist for spending so little of its advertising budget with them. In the full-page ad, which ran in the Detroit Free Press, Wall Street Journal, Washington Post and Michigan Chronicle and took the form of an open letter to Barra, the media companies said they had been "ignored and excluded." The ad also accused General Motors of “hiding…