Always distinguish
Anyone who says that Mitt Romney is pro-life is speaking a material falsehood.
Romney is not pro-life. He is anti-abortion-in-most-cases. To be anti-abortion-in-most-cases is to hold a morally evil position. To be pro-life is to hold a morally good position.
If you can't tell the difference between good and evil, then you shouldn't tell Catholics how to vote in the general election.