Objective Evidence on Media Bias: Newspaper Coverage of Congressional Party Switchers

Are the media biased? Many sources answer in the affirmative, typically indicting the media for a pro-liberal or pro-Democratic slant. Analysis subjecting these claims to objective testing, using baselines with which to compare coverage, has been lacking. By studying newspaper articles on congressional party switchers (members who have left their political party in mid-term), this research compares coverage when members of both parties have engaged in the same behavior. The results provide little evidence of partisan media bias, and no support for allegations of a pro-liberal or pro-Democratic bias.