New Jersey Gov. Chris Christie's scandal-plagued January just got worse.
Federal prosecutors are advancing the George Washington Bridge lane-closure investigation and have subpoenaed documents from Christie's re-election committee and the state GOP.
Christie has said he was not involved in the plot to close access lanes to the bridge that spans the Hudson River between New Jersey and New York in September. He fired his deputy chief of staff when her involvement in the plot, which created gridlock over four days, became public. He also says he will cooperate in "appropriate" investigations.