The Liberal leader has declared that prospective candidates must agree to vote in favour of a woman's right to choose whenever such issues arise in the Commons.
Conservative rivals say that will make it tricky for pro-life Liberals to mount an effective challenge, and could deliver crucial votes to the Tories in close races.
A case in point is Mississauga South, a Toronto-area riding held by Conservative Stella Ambler, who opposes abortion. The Liberals have approved one potential candidate so far, community activist Julie Desjardins, who also happens to be pro-life.
Ambler says the Liberals will have a tough time in a riding with an overwhelmingly Christian voter base.
Desjardins, a chartered accountant, disagrees, saying the Conservatives have had years to take action against abortion, but have done nothing.