He has addressed the annual march remotely before, but this will be the first time that a sitting president will speak at the anti-abortion rights event.
The president was opposed to abortion rights and his vice president was the first to speak at one of their decades-old rallies. But that doesn't mean everyone at the March For Life backed Trump.
Some Republican lawmakers, many of them women, felt the language of the limit was too restrictive — allowing abortions in case of rapes, but only if the attacks were reported to the police.