Sen. Pat Toomey’s (R-Pa.) announcement that he was retiring from the Senate after two terms created an opening for one of the most hotly contested seats in the 2022 primaries. But his choice to leave comes down to a mix of personal decisions.

Sen. Toomey joins Chuck for an exit interview to talk about how the Senate functions today, his defunct push for background checks for guns and what he sees as the next big challenge for legislators in Washington. 

This interview was recorded before Tuesday's primary contest in Pennsylvania.