The March for Life has been going on for decades and has nothing whatsoever to do with Trump (though perhaps it should since he's not pro-life at all).
My husband and I will probably attend this year, weather permitting. We've been blizzarded out twice and really hope to make it this year.
The news will ignore it, of course, and anything mentioning it at all will grossly underestimate the crowd size, just as it will overestimate this Women's march.
I do understand why some women will be there, however, since Trump is a self-admitted sexual predator.