New Jersey governor and Republican rising star Chris Christie has expressed his outrage after private emails show his staff shut down traffic on the George Washington Bridge as an act of political revenge.
The bridge, leading from the northern New Jersey city of Fort Lee into New York City, was effectively shut down for nearly a week last September.
Lanes were closed and peak hour traffic was choked through a single toll booth, creating traffic chaos and deeply angering commuters.
An initial explanation for the mayhem was a traffic study gone wrong.
However, there were also allegations that it was an act of political retribution against the Democratic mayor of Fort Lee, who had refused to endorse Mr Christie's re-election campaign.
Mr Christie denied it at the time, saying it was "not that big a deal".
"Just because press runs around and writes about it both here and nationally, I know why that is and so do you," Mr Christie said then.