A Christian isn't commanded to commit the Bible to memory. A Christian is a person that believes that Christ is indeed the Son of God, that He died for our sins on that cross, and accepts that gift of salvation. Don't judge Trump or anyone else based on his Biblical knowledge. Judge him based on how much he loves Jesus. If you don't know how much that is, then don't judge at all. Judging not, prevents you from being judged down the road...