First, that most of his support comes from candidates already in the race and not from newly inspired voters. Second, his campaign drew from both the front-runners and the second-tier candidates and hurt Ted Cruz among the front-runners and Rick Perry among the second-tier candidates the most.

Third, his support comes from across the full range of Republican identifiers but is slightly higher among those who are less well educated, earn less than $50,000 annually and are slightly older.

Fourth, Tea Party respondents supported Trump at slightly lower levels than the totals for Cruz and Fiorina but higher than for the rest of the field.

Fifth, if his candidacy falters or he quits the race, no single candidate benefits in more than the low double digits, and those he hurt the most—Cruz and Perry—probably do not make up their losses, notwithstanding Cruz’s machinations.