Analysis: What impact on the race (and the other candidates) would a Jeb Bush candidacy have for 2016?

http://www.washingtonpost.com/politics/republican-contest-for-2016-race-is-heating-up-quickly/2015/01/04/ed4a72c2-9427-11e4-aabd-d0b93ff613d5_story.html?tid=pm_politics_pop