We will be held accountable for our inaction insofar as what we are instructed to do.But what you seem to overlook is that we will also be held accountable for our inaction.
I understand that you have your reasons for not casting a vote, I have been tempted to do the same more than once.
Are we instructed to support evil with our voice if it is the lesser evil? Maybe, but I am not persuaded that is the case.
I think of all the actions Jesus could have taken to overturn the secular government. He took none. In fact, when challenged (Jews thought that is what He would do, many hoped for it) He corrected them.
I think of the early church. They had opportunities to participate in their secular government. They refused and were called unpatriotic for it (even a dangerous to Rome because of it).
I understand that you are planning to vote for Trump. I would much rather see Trump elected as well.
To help me understand your reasons for supporting the GOP, what exactly do you hope to accomplish (what policies, insofar as strengthening the Kingdom, do you think your support will usher in)?