If we want to make any progress a lot of people are going to have to get over the idea that every politician has to be perfect 100% of the time on every issue.
I don't know why AOC voted the way she did, and I don't care.
If I agree with someone 51% of the time, I'll vote for them.
Escaped slave Frederick Douglas supported Abe Lincoln over a candidate who was pushing for immediate abolition of slavery. Douglas knew that it was better to win and be able to influence the sitting President than to lose and have no power.