That is a totally false statement. Americans are overwhelmingly against abortion on demand. About 70% of Americans are 'pro-choice' only for the case in the life of the mother. Once you include the life of mother exception, 'pro-choicers' become the minority. Then if you also make exceptions for rape and incest, the Pro-life position is favored by about 2/3 of Americans. So as long as you make it crystal clear that you are maintain protection for abortion in certain cases (life of mother, rape, incest), you will have a very solid majority of support. Of course the Dem tactic will be to confuse this issue with their usual scare tactics.