The above referenced document also says:
And
Of course the Church doesn’t want one to vote in favor of something that goes against Church teaching, such as abortion. But they do NOT tell us HOW to vote, but give specific guidelines that we are told to consider. Yes, abortion is a very important consideration. But it is not the ONLY consideration. Yes, we are to use a well informed conscience. Yes, the Church wants us to vote to eradicate abortion. But we are not sinning if we do vote for a pro-choice candidate depending on our intent. If you vote for a pro-choice candidate because they are pro-choice, that is sinning. But if you vote for a pro-choice candidate because you feel other important areas will be impacted, and those areas are important to you as well, that is a lesser evil.
Of COURSE the Church wants you to vote with all their rules and regulations in mind, and of course they want you to vote to outlaw abortion, and of course they will groom Catholics to do so, but one won’t go to Hell for voting for the other guy. Nor will one a “bad” Catholic for doing so. As the above document says, there are also other ways to participate besides voting, in our daily lives to encourage good and not evil.
But no where in that document (or others shown from the Vatican or Bishops) say you absolutely have to vote one way or another, else be separated from the Church. If that was our instruction, they would say so. Just like they are specific - to the letter about - other issues in which we are required to do or not do in order to be compliant with the Church.
If we are forbidden from voting for a pro-choice candidate, they would say it, just like we are forbidden from using artificial birth control, and MUST attend Mass. If this is an area unbending, they would make that as clear as the other areas that are unbending.