As Gov. Chris Christie gets set for a 12-state tour that many believe is a presidential run precursor, he is fighting off shrapnel from the ongoing Bridgegate scandal.

Governor Chris Christie is interviewed by CNBC Chief Washington Correspondent John Harwood during the Delivering Alpha Conference. (Governor's Office/Tim Larsen)

At a luncheon yesterday, he said it's 'bull' when people suggest his tough attitude fostered an office culture that led to aides ordering the politically motivated GWB lane closures.

While a lot of the scandal hysteria has died down, Christie is continues to be asked out.

Meanwhile, his next chief of staff, Regina Egea, testifies today before the legislative panel probing Bridgegate.

The hearing could be the last for the committee, as they throttle back to avoid stepping on the toes of the U.S. Attorney's office's investigation.