President Donald Trump greets Republicans after his State of the Union address to a joint session of Congress in February. This president and his party have shown they’ll sideline any member of the administration who isn’t a partisan loyalist.

J. Scott Applewhite / AP

President Donald Trump greets Republicans after his State of the Union address to a joint session of Congress in February. This president and his party have shown they’ll sideline any member of the administration who isn’t a partisan loyalist.