When President Trump speaks at the March for Life on Friday, it will be a moment of both triumph and peril for the pro-life movement.

It’s a triumph because it’s the first time a president has ever addressed the March in person. President George W. Bush never spoke to the March for Life. He always had other obligations, somehow, like his father before him and even President Ronald Reagan. So, while Democratic presidents have firmly and shamelessly attached themselves to the abortion industry and the abortion lobby, Republicans until now have kept the pro-life movement at an arm’s length.