Losing five primary elections in a row, by margins as great as 30 percent, isn't a big enough hint. Coming in fourth in a three-person race isn't either. Who are these people voting for Ben Carson?!? https://t.co/OZJJsybjEp pic.twitter.com/lasYWjRXq4 — Gideon Resnick (@GideonResnick) April 20, 2016   Neither is the fact that it is mathematically impossible for GOP presidential…