-the one that you want as a straight-ahead result. If you try to use math to get that result, fine, but it's not 21% + 26% = 47%. You have to use the correct formula, the rule of addition for the probability of the union. This is determined by the way the poll designed (as I said in first post, Trump, GOP, Dem... all are mutually exclusive fields in this poll). This is just 101, very basic. Go to ask any regular person/student in person, who had this math education, he/she will explain it more clearly to you.
Put aside the math, please just use common sense. If it is such simple as Trump + GOP Congress = 47%, why CNN didn't point it out? because they know math doesn't allow them to do it. it's going to be a fraud if they do.