In Europe, say the Cardinal's native Germany, there is no such thing as a prolife candidate.
There are candidates who support only first trimester abortions and there are candidates who support third trimester abortions.
Who do you vote for? By the idea of "proportionate reason" you vote for the former since fewer abortions will likely occur if they are legally restricted to the first trimester.
The fact that the UK and Australia do not allow third trimester abortions means that the issue is coming our way.
America has some of the most permissive abortion laws...