I got a question for you: "Just Say No" was an advertising campaign, part of the U.S. "War on Drugs", prevalent during the 1980s and early 1990s, to discourage children from engaging in illegal recreational drug use by offering various ways of saying no. The slogan was created and championed by First Lady Nancy Reagan during her husband's presidency.

Based on this passage, who started the just say no to drugs campaign?
Let's think first:
The relevant sentence in the passage is: The slogan was created and championed by First Lady Nancy Reagan during her husband's presidency.
Therefore, the answer is First Lady Nancy Reagan.