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For the next five weeks, TV viewers in New Hampshire and Iowa will see more of the G.O.P. presidential candidates than they will see of David Letterman and Jay Leno combined. The candidates have already aired more ads in the battleground states than in any primary campaign in history. Richard Stengel analyzes some of the most telling ones.

BOB DOLE WHAT YOU SEE: With black-and-white photos of Dole as a young lieutenant in the background, his wife Elizabeth tells the moving story of his wounding in World War II and the long road back.

WHY YOU'RE SEEING IT: Only when Dole...