Convince at least one person not to vote for Trump. If they are opposed to Biden okay, but when they go to vote leave the choice for president empty, and then vote for all their other candidates. Many who are not Biden supporters know Trump is not a good choice. This might help produce a much needed landslide loss for the President, ensure his departure, and allow citizens to perform their civic duty to vote.
Any valid argument that convinces them should be employed. But in the end it is their decision and this is a fair and independent process of which we can all be proud.
Peace and stay safe.