Because they’re desperate to prove they’re not racists.
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That is a lot of it. It’s certainly not because of where he stands on real issues.
And the funny thing is, Carson first came to national attention when he spoke at the 2013 Prayer Breakfast and warned people about being PC—much to the discomfort of Obama, who was sitting right next to him and was not happy at all.
But now his supporters seem to be succumbing to political correctness.