Is Marco Rubio The Real Outsider in the 2016 race for President

Jeb Bush, despite never serving in Washington, has been tagged by virtue of his family and his deep donor support as inextricably linked to the establishment. The candidate he is most closely eyeing right now, Senator Marco Rubio of Florida, has been laying low for much of the summer of Trump. He is trying to stay above Mr. Trump’s increasing criticisms, and he has been gaining a sense of momentum.

But Mr. Rubio, who won the 2010 primary in his state as a Tea Party candidate, has been in Washington for almost five years. Navigating the current dysfunction could be a challenge.