At times, as Donald Trump and Hillary Clinton have fought each other in the presidential race, the battle between incumbent U.S. Sen. Marco Rubio, a Republican, and Democratic challenger Patrick Murphy has seemed like a quiet undercard.
It hasn't helped that national Democrats have been withdrawing their advertising support for Murphy to funnel money to Senate races in other states that seem more promising. Or that Florida plays just as important a role in the race for the White House as it does in the jockeying for control of the Senate --- if not more so.