Similar to the US Council of Catholic Bishops statements. Except in the US version they explicitly say that if a politician supports a “bad” policy (choice rather than anti-abortion for example), you can vote for them if they support other major policies that are “good” and if you vote for them despite their stand on abortion, not because of it.
I suspect very few politicians would support all the “good” positions in the letter. So you need to do the best you can…