Analyzing Trumps answer further, before he said women should be punished, he said "people in certain parts of the Republican Party and conservatives would say yes"....
He gave a Pro-choice answer. He has been Pro-Choice all his life and he believes that is the position of Pro-Life people. I have never met a conservative, even one active in Pro-Life causes that ever took the position that the woman should be put in jail. He doesn't know how to answer the question, because he is not really Pro-Life.