Opposition leader Isaac Herzog (Zionist Union) defiantly denied any wrongdoing on Wednesday shortly after it was learned that the attorney-general had instructed law enforcement to conduct an initial probe into possible violations of campaign finance laws. Saying that he welcomed the announcement, Herzog accused the Likud and "frustrated operatives" of conducting a campaign of "political slander."The Zionist Union chief said that the allegations, which stem from suspected irregularities committed during his run for the chairmanship of the Labor Party, were made before the elections and were denied."I'm certain that the probe will debunk these bizarre claims once and for all," Herzog said. "I will cooperate fully with whomever necessary in order to get to the bottom of this matter as soon as possible."