If we're looking at a Donald Trump-Bernie Sanders presidential election in 2016, you'll see Mike Bloomberg run for president (The Nanny Statist in-Chief Running For Commander-In-Chief) and the Gary Johnson campaign will just become that more important.
With the two big government candidates trying to out big government the other. The Donald, waking up little Latino kids in the middle of the night to kick them out of the country, because they're parents are here illegally, or brought them here illegally. As well as throwing out Freedom of Religion for Muslims and nationalizing Mosques. Feel The Bern, is really feeling Uncle Sam with his hands stuck in the pockets and taking from your wallets from you. Because Uncle Sam is addicted to other people's money and wants to tax every dollar possible from everyone. Because he knows best how to spend everyone's money better for them. According to every Socialist's favorite uncle and other American's worst nightmare in Uncle Sam. That Bernie Sanders thinks is simply not powerful enough and doesn't have enough of other people's money.
Assuming The Donald and The Bern are the top two major presidential candidates and I think they're still a long shot at this point, but for the fun of it lets say they are, Gary Johnson who is what I at least would describe as a Left-Libertarian, or Classical Liberal, running against a Democratic Socialist in Bernie and a reality TV actor in Donald Trump running as a Fascist Neoconservative, you have to have someone in there to say, no! Big government from the Far-Left, or Far-Right, is never the solution. And you need someone who will return power to the people from an economic and personal standpoint. And send power to the states as well. While Washington gets its fiscal house in order and gets the economy going again. That is what a Gary Johnson for president will represent. Especially running against a Fascist and Socialist.