Scott Walker and Jeb Bush were bound to collide sooner or later. It turned out to be sooner. As the son of a Baptist minister, and the son of the 41st president of the United States, these two were destined to be the odd couple of the 2016 election. Walker is running against the establishment and the Washington elites. Bush embodies both. Walker will need at least $100 million to compete in the GOP primary, and more if he makes it to the general. Most of the Republican donors who write those kinds of checks are on Bush’s speed dial....