During Wednesday’s presidential debate, Hillary Clinton called for Americans to go online to search for “Donald Trump Iraq.”

People actually listened.

Mrs. Clinton’s suggestion came during a discussion about the Islamic State in Iraq and the offensive in Mosul.

She pointed to Donald J. Trump’s previous support of the war. Then she urged voters to fact-check her assertion for themselves.

“I just want everybody to go Google it,” she said. “Google, ‘Donald Trump Iraq.’ And you will see the dozens of sources which verify that he was for the invasion of Iraq.”