He has not yet run in a primary. Are you the only person in the US who knows what the laws are? Why is the question even being asked if he would run third party if he is absolutely prohibited from running?
He's been asked about third party numerous times since he announced.
No, I gave you one link, how many do you want?
Why is the question even being asked if he would run third party if he is absolutely prohibited from running?
Because he is leading and could take the election away from Hillary if he isn't bashed down. The vast majority of the population doesn't question what is the leading topics in the main stream media.
http://www.washingtontimes.com/news/2010/oct/24/florida-eyes-sore-loser-election-law/?page=all
http://www.newser.com/story/181253/sore-loser-laws-are-ruining-elections.html
“Sore loser” laws prevent a candidate who loses in a primary election from running in the general election as a candidate of another party. In 2012, this mechanism prevented Texas Lt. Governor David Dewhurst from considering a run for U.S. Senate as an independent after he lost to Ted Cruz in the Republican primary election.
http://www.ncsl.org/research/elections-and-campaigns/the-canvass-march-2014.aspx