With just nine months to go until prospective presidential candidates must declare their intentions, the debate among Republicans is heating up.

In a remarkably frank talk on Sunday, Jeb Bush made it clear that his campaign—if there is one—would challenge the tea party's hold on his party. About illegal immigrants, he said, "Yes, they broke the law; but it's not a felony, it's an act of love." Because it is an illegal act, "There should be a price paid." But "it shouldn't rile people up that people...