“Not sure where you got those numbers but try this:
100% (Republican Primary Voters) - 41% (Trump Voters) = 59% (Not Voting for Trump).”
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There is a flaw in your logic. Actually the 59% you reference above are voting for someone other than Trump who is their 1st choice amongst the available candidates. That does not mean they are all “anti-Trump” votes. While some are; some likely favor Trump as their 2nd or 3rd choice. It’s really impossible to predict how that will all “shake out” as the field winnows down.