Last night Donald Trump advertised his big and beautiful plan for his first 100 days. The president-elect recorded a YouTube video to make clear that he's preparing to wipe away his predecessor's legacy on day one.

But the pro-life coalition might find his digital fireside chat disturbing because of what wasn't in it.

Trump promises to unilaterally renegotiate deals and roll back regulation while creating energy jobs and retiring lobbyists. He has not, however, promised to do what every Republican president has done on his first day in office since Ronald Reagan — to keep taxpayer dollars from funding abortions overseas.

For the pro-life community, that's a problem. They put their full faith and credit in Trump. Catholic voters swung hard for Trump and evangelical voters gave him a record margin in the modern history of exit polling. If the Mexico City policy isn't immediately reinstated through executive order, it could indicate that they made a poor investment.

Incoming and outgoing executives have been jousting over abortion with their phones and their pens since Reagan. Within weeks of taking office, Democrats revoke and Republicans reinstate the Mexico City policy through executive action. Eight years ago, President Obama repealed the provision which prohibits federal funding of international abortion.

Since then, the federal government has spent an estimated $3.6 billion to fund overseas abortion providers like the International Planned Parenthood Federation. In 2015 alone, that group performed nearly a million abortions according to its own records.

This January, it will be Trump's turn to follow Ronald Reagan's example. His recent video demonstrates that at least this might not be a top priority for him to mention.

Before Election Day, Trump offered promises as collateral for the pro-life movement's support. In a much lauded September letter, the New York businessman offered conservative Supreme Court justices and an end to Planned Parenthood funding. In return, the pro-life movement overlooked Trump's questionable record and offered their endorsement.

If the pro-life lobby expects to keep the president-elect honest, they need to lean on the Trump administration now and specifically on Vice President-elect Pence. While still an Indiana congressman, Pence not only defended the policy, he tried to extend it domestically.

Progressives are already mobilizing on the issue and will make it politically painful for Trump. Yesterday, the Center for American Progress called on the new administration to buck Republican precedent and "commit not to reinstate the Mexico City policy."

If the president-elect isn't pushed to sign an executive order reinstating the policy — the easiest pro-life lift possible — all of his more ambitious promises could quickly unravel.

Philip Wegmann is a commentary writer for the Washington Examiner.