Notes:

"[P]opularity is performance in politics, and Trump is the first candidate in modern presidential primary history to begin the campaign with a majority of his own party disliking him. A whopping 57 percent of Republicans have an unfavorable view of Trump, according to an average of the three most recent polls. That beats former record holder Pat Buchanan, who had a 43 percent unfavorable rating at this point in the 2000 election cycle. Buchanan, of course, ended up running as an independent."

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