Sen. Russ Feingold (Wis.) became the first Democrat to openly criticize Senate Majority Leader Harry Reids (D-Nev.) use of racially insensitive language and declined to endorse Reids continued tenure as Majority Leader.In an interview with ABC affiliate WISN, Feingold criticized Reids characterization of President Barack Obama as light-skinned without Negro dialect. Feingold called those comments unfortunate and racially insensitive.When asked whether he would call on Reid to step down, Feingold said he was still considering that option. Im thinking about that and were going to be getting together as a caucus next week and the topic will come up. I have not decided whether these comments merit that or not.Theyre very unfortunate. They should have never been said. So, I need to think about it, Feingold said.Feingold is the only Democrat to criticize Reid, and his comments could severely undercut claims by Reids office and other top Democrats that the Majority Leader enjoys the full support of his Conference.