I honestly can't figure out if this is a real thing, or just some sort of stunt vote to rile up conservative bases.
If a baby can breath out of the womb, the abortion is illegal. Lets keep in mind that if for some reason a baby is born extremely pre-mature (like 18 weeks or so maybe?), the baby may still attempt to breath with what faculties it has, but will not have the capacity to be able to sustain its own life. It is essentially gasping and dying a terrible death.
Babies develop at different rates of course. So there is some + or - here. But I am just not convinced that this is something that actually occurs.
Late term abortions should not be allowed unless the mothers life is gravely and certainly threatened in my opinion. If the fetus is viable outside of the womb, i think its too late to change your mind.
But this thing just sort of stinks as some sort of stunt. In fact, the republican reactions to it were hyperbolic, and the mem soldiers are out painting anyone willing to have a conversation about it as someone who embraces infanticide. So it just sort of seems inauthentic to me.