Anti-Norm Coleman graffiti continues to crop up in Minneapolis, a local TV station is reporting, as a local business was tagged with the words "RETIRE" and "NORM" over the weekend.

Similar graffiti was sprayed on the home of Sen. Coleman (R-Minn.) and five other Minnesota lawmakers last week. Based on similar handwriting, police believe the same vandal to be responsible.

Coleman is locked in a tough reelection battle against Democrat Al FrankenAlan (Al) Stuart FrankenFranken targets senators from both parties in new comedy tour Al Franken on another Senate run: 'I'm keeping my options open' Andrew Cuomo and the death of shame MORE, a race that has drawn national attention.