Two states struggling with gun violence this fall, Wisconsin and Michigan, also have been targeted for campaign expenditures by the National Rifle Association.

The big gun rights group appears to have its biggest political footprint in Wisconsin, where a gunman on Sunday shot seven women -- three fatally -- before killing himself in state's second mass shooting this year. Of the $5.9 millon the NRA Political Victory Fund, has spent so far to defeat President Barack Obama, at least some has gone to Wisconsin. While the Federal Election Commission does not require independent expenditure groups to identify ...