"I just think the story is far-fetched," Stack, a Democrat, said in an interview with CNN's The Lead on Tuesday. "My relationship with the governor and his staff and this administration has been one of the best."
Stack's comments come as Zimmer revealed two letters which she said proves that Christie's aides threatened withholding relief aide for Hoboken.
Stack added that in his experience he's never seen "strong-arm tactics" from Christie's office.
"I've never had strong-arm tactics, in fact, they've gone out of their way to be helpful," Stack said.
Correction: This post incorrectly referred to Jake Tapper's show on CNN. It is 'The Lead,' not 'The Lede.'