I do not have to defend my vote, but I will explain it to those of you who missed it in theology class, provided you were in theology class as I know not all Catholics have been.
It is not my intention to promote abortions by voting for Bernie Sanders. I don’t feel Bernie Sanders is going to be actively promoting abortions.
There are three components of any act: the act itself, intention, and consequences.
If a doctor knows a pregnant patient who has a diseased uterus, or cervix. is going to lose her child if he operates, he is not performing an abortion by removing the uterus and thus killing the child. He’s not even participating in abortion. The death of the child is not his intention; curing the patient of a diseased uterus is.
If a doctor knows the only way to relieve a patient of intractable pain is by giving him or her a huge dose of morphine that will likely kill him, his intention is not to kill the patient, but to relieve his pain. Therefore, when the patient dies, as the doctor suspected he would, the doctor is not morally culpable.
I am not voting for Sanders in the hope that he allows abortions to continue. I hope parents educate their children about the evil of abortions. I am voting for Sanders because I believe he would be the best and most honest president of the United States and do the country a lot of good. My intention is to see Sanders as president of the US, not to see abortion continue (and it will continue no matter who is elected or what their view is). I do not feel I can, in good conscience, vote for someone I believe is just saying what he feels the public wants to hear or someone who doesn’t even show up to work. The presidency is not a job where “not showing up for work” is an option.
The above is what is taught in every good textbook on moral theology. It is not proportionalism, etc. Ir is one of those “gray areas” in moral theology that another poster said did not exist. They do.
You can read about this in Morality: The Catholic View by Servais Pinckaers or The Moral Virtues and Theological Ethics by Romano Cessario or Life Issues, Medical Choices by Smith and Kaczor.
I don’t want to “discuss” it, it is just an explanation for all who “don’t know how a Catholic could vote for someone who believes in abortion.” Bernie Sanders, or even Hillary Clinton, are not going to be performing abortions or actively trying to persuade women to have one. Nor do I believe any Republican is going to do anything to put an end to abortion.