Yes, there is one way this is in error. We vote for candidates, not against them. I only mention this because of the third party issue.
The integrity of the candidate also can be a factor.
You and I believe this is clear teaching, but I have seen numerous that have arguing against the right of the USCCB to teach this.
There are several things that come close, for example the killing of hundreds of millions through war, the destruction of the planet as a whole, genocide. These all come close. So are they likely? Well, is ending abortion through Trump likely?
I vote against candidates all the time, and in most instances, should. I’m not in love with Trump, I’m mostly against Hillary Clinton. Those are the only two who will be running, so there’s no choice.
The USCCB’s documents are binding in conscience in only a very few instances, and I think you know what they are. Otherwise, they are worthy of attention and respect. But they are almost never mandatory. I, for one, tend to pay them little attention the farther they stray from actually teaching Catholic doctrine. For an example, there was one letter issued by, I think two bishops, in which they endorsed Obama’s gun control proposal before he even said what it was. I paid that one no attention. On another occasion, one bishop issued a letter on USCCB letterhead condemning Paul Ryan’s advocating a reduction in food stamps. What he really did was propose an 8% INCREASE instead of the 12% the Democrats in congress wanted. I ignored that one too.
But when they actually touch on the teachings of the Church, one needs to pay attention, particularly when its endorsed by more than a handful of bishops.
If Trump appoints the kinds of people to the Supreme Court that he says he will, abortion on demand might very well be ended. With Hillary Clinton, there’s no chance at all, for generations.
I’ll vote for the chance and against the certainty.
And no, the U.S. indulging in genocide, starting a nuclear war or destroying the planet are so unlikely as to not warrant serious attention. But with Hillary Clinton, war in some lesser form is much more likely than it is with Trump. She seems to revel in it, and that should be disconcerting to everyone.