Andrew J. Clarke writes:
"Following the Republican failure to repeal and replace Obamacare last week, President Trump took aim at the House Freedom Caucus. He has called the group an obstacle to conservative goals and even called for Republican primary challenges against them in the next elections.
"His threats are unlikely to work. Here’s why.
"Most members represent solidly conservative districts, and few faced a tough primary challenger in 2016. The figure [above] plots the ideological positions of House Republicans in the past Congress. As you can see, the Freedom Caucus is clearly the right wing of the party, which puts them in a good position to survive a contested primary....."