Data show threats against lawmakers are on the rise, nationally and in Minnesota. The town hall attack on Rep. Ilhan Omar in Minneapolis on Tuesday once again ignited the debate over political rhetoric, as "extremely concerning" new data show a surge in threats against lawmakers. By the numbers:The U.S. Capitol Police investigated nearly 15,000 threats against lawmakers last year, marking the highest number in six years. In Minnesota, the State Patrol investigated 30 threats against lawmakers, a more than seven-fold increase from the previous year, when the agency investigated four threats. The impact of inflammatory rhetoricWhat they're saying:Retired FBI agent Rob Chadwick expressed concern over the rise in inflammatory rhetoric.