Good point, Trump had to walk a fine line. If he promoted the vaccine too much the DNC-Media and the Democrats would use that to create fear uncertainty and doubt to reduce vaccine acceptance. At any rate Biden has completely failed, hasn't even attempted if we're being honest, at getting the vaccine wary to vaccinate. A Soviet style mandate with vaccine passports has been proposed, I can see why that's attractive to authoritarian left. A better approach would be persuasion which Biden can't do with his diminished mental and physical state. Being president means showing up.