As former Vice President Mike Pence positions himself for a possible presidential race, he is setting a great example of substance of the sort that the public should demand from all White House aspirants. On Thursday, Pence’s Advancing American Freedom organization launched a “Freedom Agenda” featuring what, by modern standards, is a remarkable amount of depth and specificity. Readers may also be struck by how much its tone sounds Reaganesque, more focused on what the group (and thus Pence) is for than what it opposes. The agenda is divided into three sections: American culture, American opportunity, and American leadership. Each...