President Trump's campaign has launched a coalition of anti-abortion advocates Friday that will work to reelect the president in 2020.

The "Pro-Life Voices for Trump" coalition will mobilize voters who oppose abortion to support Trump in November.

The coalition is led by Marjorie Dannenfelser, the president of the Susan B. Anthony List, a campaign group that supports Trump and other anti-abortion candidates running for office.

ADVERTISEMENT

“I am honored to be asked by President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE to once again flex the muscle of the pro-life movement behind his reelection,” said Dannenfelser, who held the same position in 2016.

Father Frank Pavone, national director of Priests for Life, will also serve as co-chair.

Trump will become the first sitting president Friday to address the March for Life, the annual march against abortion in Washington, D.C.

Trump has made abortion a key issue in his 2016 and 2020 campaigns, an issue of vast importance to a core part of his base: conservative, evangelical Christians.

His administration has made several changes that were pushed by anti-abortion advocates, including removing Planned Parenthood from a federal family planning program and banning U.S. aid for foreign nongovernmental organizations that provide or promote abortions.

Trump used to identify as "pro-choice," leading anti-abortion advocates to initially oppose his candidacy.

But he has since won over advocates who frequently describe him as the "most pro-life president in history."