The targeted shootings of two Minnesota state lawmakers this weekend underscore a grim trend: An increasingly volatile political climate has left state and local officials more exposed than ever to threats and harassment.

A man accused of killing a Democratic state lawmaker while posing as a police officer is expected to appear in a Minnesota court on Monday afternoon on state murder charges. Vance Boelter, 57, is being held in Hennepin County after he was arrested on Sunday following a massive manhunt over the weekend.

Authorities are still searching for the suspect after the targeted shootings of Minnesota lawmakers Rep. Melissa Hortman and Sen. John Hoffman.