No media bias here.

A Tax-cut rally was held at the Minnesota state capitol on May 2. Thousands of people attended. Republican governor, Tim Pawlenty, spoke. If you were a reader of the Minneapolis Star-Tribune, though, you would have no idea that such an event took place.

A Pro-Tax rally , however, apparently was newsworthy enough to make it into the state's largest newspaper, although the comments suggest it was sparsely attended. 

Both events seem like they would rate a mention in the newspaper. This blatant example of bias makes me feel better about dropping my subscription and continuing to tell them "No" every time they call me begging for me to let them send me their rag for practically free.