FiveThirtyEight

Aisle-crossing senators from both parties lost in 2018

Party unity scores for senators in the 115th Congress

Lost re-election

Left Senate

FiveThirtyEight’s party unity score measures how often someone votes with his or her party, which is calculated using a rolling average of each member’s voting record from up to the past three Congresses, if available, weighted by votes per Congress. Scores are up to date through Nov. 10, 2018. Members sworn in after Aug. 1, 2018, are excluded from this analysis.