Hansen continued: "While Walker tries desperately to whitewash his worst-in-the-nation job creation record ahead of the June 5 recall election, Christie probably isn't the best choice to talk up Walker's failed leadership: while Wisconsin lost 4,300 private sector jobs in March, New Jersey lost nearly triple that number, at 11,600."

CNN asked the New Jersey Republican State Committee about Hansen's criticisms.

"Gov. Christie is proud to support another Republican governor who, like himself, faced seemingly insurmountable problems upon being elected and is meeting the challenge by making tough choices, like closing a $3.6 billion deficit without raising taxes on families," wrote Communications Director Douglass V. Mayer. "The governor will stand with leaders who make the right decisions, not just the choices that are politically expedient."

Recent polls show a tight race between Walker and his likely Democratic opponents: Milwaukee Mayor Tom Barrett or Dane County Executive Kathleen Falk.