Vance Luther Boelter, 57, was arrested on Sunday for allegedly killing a Minnesota Democratic state lawmaker and her husband while posing as a police officer, Governor Tim Walz said.

A manhunt is underway for a man suspected in the killing on Saturday of a state lawmaker and her husband and in the shooting of another lawmaker and his wife. Here is how the events unfolded.

State Senator John Hoffman and his wife, Yvette, were gunned down at their home early on Saturday morning, but survived. Melissa Hortman - the top Democratic legislator in the state House - and her husband, Mark, were shot and killed. Yvette Hoffman said in a statement that she and her husband John were "devastated" by the Hortmans' deaths.

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.

President Donald Trump told ABC News on Sunday that he "may" call Minnesota Gov. Tim Walz after a political assassination sent shockwaves through the state.

"Hi everyone! I’m looking to get back into the U.S. Food Industry and I'm pretty open to positions," Boelter wrote on LinkedIn last month.

Political leaders from across the spectrum and around the country called for calm after one Minnesota lawmaker was killed and another was seriously injured in apparent politically motivated shootings on Saturday.