Simplicity —which often involves leaving things unsaid —is a rare tactic in advertising today. We want every bell and whistle listed and explained for us completely and quickly so we can get back to playing Wii! Political ads are no exception. Here's Barack Obama's newest ad attacking McCain; it takes the trouble to spell out, on screen, the same things the announcer is saying, because Americans have lost our ability for inference along with our attention spans. It lacks three crucial things that the classic 1964 LBJ ad, titled "Merely Another Weapon" (after the jump) has: One clear message; a trust that viewers will understand that message themselves; and awesome atom bomb blasts: Click to view [LBJ ad via The Living Room Candidate ]