I got a big question for you Father. I'm not sure if my canvassing and voting for the Democratic Party in 2016 was morally just. I didn't take the issue lightly, and I firmly believe that life begins at conception and obey the Church's teachings. I've been getting involved with the Democrats for Life to try and change the direction of the party. If I were given the chance, I'd make that same vote, and am only sorry that it wasn't enough to stop the current situation. Am I in mortal sin?
A mortal sin requires grave matter, as well as deliberation and free will.
I doubt that canvassing for the Democratic Party could be classified as “grave matter.” If you were to canvass in favor of abortion, or the “right to choose” and try to convince people that this was a good thing, that would be grave matter. But it is clear that such was not your intention at all, so that is not a problem here.
As much as I disagree with the evils promoted by the Democratic party, along with the bad, I have to admit that there are good elements of service, justice, and the search for the common good in education, which are part of the Democratic platform. It isn’t 100% bad.
As to whether canvassing for the Democratic party in 2016 was morally just, I can not answer that question. I am no authority to speak for the entire Church, and this question speaks to an individual, their values, and what in particular of the Democratic platform they were trying to promote.
From what I can tell of your intentions, they seem like they were sincere, motivated by a faith vision that respects Life, and were seeking the good of the country.
While I disagree with some of the politics of the Democratic Party, as many Catholics would, who are vehemently opposed to abortion, gay marriage, embryonic experimentation, and federal mandates for contraception in health insurance, etc.–from a religious and moral point of view, I see no intention on your part which was wrong or sinful.
After all, good and sincere Catholics can have very opposing and different judgments on specific political candidates, and specific political platforms. Each has different conclusions on what is most prudent and wise for the direction of the nation. No, I definitely do not believe you are in mortal sin. God bless and take care, Fr. Angel