The other day a friend asked me, “What’s the deal on the battleground states and Libertarian presidential candidate Gary Johnson in the 2016 presidential race for the White House?"I told him those are the states most likely to be in contention for their Electoral College votes for president this year. I added, they are also known as “swing states” in the lingo of politicians, pollsters and pundits.Defining the battleground or swing states is a whole lot easier than naming them with any degree of precision or consistency. Why?