It’s legitimate in that Emerson College does have a polling outfit that produces polls and is released to the media. How accurate is the Bush number? It doesn’t track with anything previously published anywhere, but if you read the internals, it MAY be coordinated with Jeb’s campaign. There is an analysis in there that talks about the Right to Rise PAC having an effect on the race, although the analysis was conducted by a college junior..lol...Who knows. Trump is tracking where he always does, but I highly doubt Jeb is at 18%.