Which U.S. president's public criticism of a product in 1990 led to its manufacturer losing millions in market value overnight?

Throughout history, politicians and government officials have had complicated relationships with product endorsements. Some endorsements have been strategic, others accidental, and some have caused major controversies. This trivia question explores a famous case where a presidential endorsement led to significant market changes and ethical debates about the relationship between government figures and private industry.

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George H.W. Bush's dislike of broccoli
Ronald Reagan's criticism of a Japanese electronics brand
Jimmy Carter's rejection of a major beer company's product
Bill Clinton's public avoidance of fast food chains