I have a lot of respect for Pope Francis, but he should probably not opine on American politics without taking more care to understand the situation. When Donald Trump can make you look like you haven't really thought through your position, you're having a bad day.
Of more interest may be his remarks on an exception to the Church's ordinary prohibition of birth control, which draws a bright line between birth control and abortion. This is the sort of thing he's better placed to talk about. I suspect there's a danger, if that's the right word, that most American Catholics would be only too happy to take that distinction and run with it. Almost no Americans of any stripe are opposed to birth control on moral grounds. If the Church intends to maintain that prohibition as a usual thing, exceptions will need to be very carefully drawn.