GOP strategists had done a good job drawing district lines to protect Republicans. Most political junkies look to past election results to see which incumbents and districts could be at risk in the next election. This year, the focus has been on 23 House Republicans sitting in districts carried by Hillary Clinton in 2016.
That’s certainly a good place to start, but it’s a bad place to stop, especially in an electoral wave. Where else should you look for vulnerable House Republicans?