Source: The Washington Post - Link
At another point, Giuliani was asked by the New York Times why he had shared the material with The Post (after Fox News passed).
“Either nobody else would take it,” he said, “or if they took it, they would spend all the time they could to try to contradict it before they put it out.”
In media circles, this process of double-checking the validity of information before sharing it is called “vetting” and is generally considered an important step for not providing false information to the public. For Giuliani, it was an encumbrance, a roadblock to his actual goal: undercutting Joe Biden by any means possible.
The “Hunter Biden laptop” was so obviously Russian disinformation that even Fox wouldn’t touch it without investigating it first.