Here are 12 Senate, House incumbents who’ve lost their primaries

Summary

This year’s election cycle has seen a dozen congressional incumbents lose their primaries, with multiple contests remaining over the next month.  In the upper chamber, Sens. Bill Cassidy (R-La.) and John Cornyn (R-Texas) lost their primaries earlier this year to challengers backed by President Trump. The two have since criticized Trump and administration officials from…