He said in a speech to Florida delegates that being transgender was "the height of absurdity,” reported The Palm Beach Post.
Carson also told The Hill that he didn't think transitioning genders makes "any sense."
"For someone to wake up and think that they belong to a different sex because they feel different that day is the same as if you woke up and said I’m Afghani today because I saw a movie about that last night and even though my genetics might not indicate that, that’s the way I feel, and if you say that I’m not, then you’re a racist,” Carson told the news outlet.
Before ultimately dropping his presidential bid, Carson said on the trail that transgender people make others uncomfortable and that they should have their own bathrooms.
Carson also said, before he launched his presidential bid, that he believed being gay was a choice. Specifically, he said that people went into prison straight and came out gay.