The Rothenberg Political Report released its latest Senate race rankings today. Sen. Norm Coleman’s re-election campaign is one of just three contests across the country deemed a toss-up. The other two are Democratic Sen. Mary Landrieu’s post in Louisiana and the seat being vacated by Republican Sen. Wayne Allard in Colorado. Rothenberg’s assessment of the senate race in Minnesota is unchanged from its February rankings. Despite likely challenger Al Franken’s tax issues and lackluster poll numbers, national pundits still clearly view Coleman as a vulnerable incumbent.