 A 2015 study found negative facts are more likely to be removed from Wikipedia articles on U.S. senators than positive facts, but did not find any significant difference relating to political affiliation.Although Wikipedia is stated not to be a primary source, it has been used as evidence in legal cases.In January 2007, "The New York Times" reported that U.S. courts vary in their treatment of Wikipedia as a source of information, with over 100 judicial rulings having relied on the encyclopedia, including those involving taxes, narcotics, and civil issues such as personal injury and matrimonial issues.