Since President Obama took office threats against Democrats have increased

A coffin was placed in front of Missouri Rep Russ Carnahan's house

New York Rep Louise Slaughter received a phone message threatening sniper attacks against lawmakers and their families. A brick was thrown through her office window in Niagara Falls.

Arizona Rep Gabby Giffords office was vandalized, then she was nearly assassinated several months later.

Virginia Rep Tom Perriello's brother had a propane line from a grill cut.

Michigan Rep Bart Stupak received several threatening phone calls.

Then there was this:

Minnesota Rep Betty McCollum received a death threat her proposal to strip Pentagon sponsorship from NASCAR teams.