Congress has only a handful of Democrats who oppose abortion, but one of them will join two Republicans in headlining this year’s March for Life rally in the nation’s capital, underscoring anti-abortion activists’ craving for bipartisan support.

The activists face a difficult mission, because the number of anti-abortion Democrats in Congress is not just small but also shrinking. Lawmakers such as Rep. Dan Lipinski of Illinois, the Democrat set to speak at the march on Jan. 18 alongside Sen. Steve Daines, R-Mont., and Rep. Chris Smith, R-N.J., face rejection from members of their own party. While Lipinski is embraced by anti-abortion activists, other lawmakers face skepticism from activists who see electing Republicans as the safer route to enacting legislation.