In short, your decision not to vote after rational deliberation means it is approximately correct for other voters to think in the same way. This works like a classical cooperation game. TDT prescribes to commit to a small personal cost for a big community gain, in a similar way as one-boxing in Newcomb.
I don't have the same algorithm as others, and if I did, it would be good enough to choose one of us at random to be responsible. Taking votes from everyone would be highly inefficient.
If there's such a small chance of your vote making a difference in the election, you should be comfortable voting for trump.