The 115th Congress owes its historic turnover to the confluence of two events, one normal and one abnormal. First, there’s the start of a new presidential administration. Five of the first six members to resign this session1 did so to accept jobs in President Trump’s administration. That’s not unusual. It’s similar to the seven members who resigned in 2009 to join the Obama administration2 and the five members who left in 1993 to join Bill Clinton’s.

But in addition, three of the four most recent members to resign from the 115th Congress did so because they were accused of unwanted sexual advances: John Conyers, Trent Franks and Al Franken. (Ruben Kihuen, Blake Farenthold and Pat Meehan have announced they will not run for re-election for the same reason. However, a retirement from Congress at the end of one’s regularly scheduled term is not the same as a mid-session resignation, which is what we’re looking at here.)

The extraordinary string of sexual misconduct allegations over the past few months has led many people to conclude we are in the midst of an unprecedented cultural moment. In the political world, at least, the data bears that out.