A recent proposal encouraged letter-writing. I do not disagree with that. I'd encourage considering a related action. Send postcards. To the putative-President. To the White House. To members of Congress. As letters to the editor. Even to friends and family. Let the 'card' side (not the address side) contain a message. Large font. Brief. One point only, per card. Maybe even have a series of cards - build anticipation. The advantage? Other folks (mail carriers, others in the office where it is delivered, etc.) get to see it. It is possibly more likely to get them thinking than the addressee.