But it does cause one to think. Suppose that for whatever reason Trump should cede the presidency to his vice president—say the president makes America great again ahead of schedule or alternatively decides he’s sick of the “witch hunts”—one might ask what kind of world and what unique challenges a President Mike Pence would face. The answer is, quite simply, a multitude. Indeed, with the possible exception of Gerald Ford, the able and experienced Pence would face the most difficult political and national security headwinds of any unelected commander-in-chief in America’s history. Of the nine men who have assumed the office unexpectedly, none has faced such a vicious political, media and cultural environment—an environment where even staunch Democrats like Dianne Feinstein are booed by supporters for not endorsing socialism and propelled by a frantic social media that turns every moment of the Trump presidency into “The Wire” meets “Game of Thrones.” In the face of these challenges, a President Pence would have to make a series of quick decisions that would set the tone for his administration, determine the prospects for his policy agenda and, not incidentally, decided his political future. Among them…