premise: Former Canadian prime minister Jean Chretien on Wednesday filed an expected challenge against a judicial inquiry which blamed him for a notorious corruption scandal.
  Justice John Gomery was biased against him and Gomery's conclusion was not backed up by the information given at the inquiry, Chretien said in his appeal.
  Wednesday is the last day of a 30-day limit that Chretien could file the challenge in a Federal Court since the release of the Gomery report. In his initial investigation report released on Nov. 1, Gomery confirmed a system of illegal kickbacks and contributions that funneled millions of dollars to the federal Liberal Party in Quebec.
  He described Chretien as the architect of the program, and his chief of staff Jean Pelletier as the man who implemented it. And Prime Minister Paul Martin, then Chretien's finance minister, was exonerated of any wrongdoing over the scandal.
   Why did Jean Chretien file a challenge against the judicial inquiry according to his appeal?
hypothesis: contributions that funneled millions of dollars to the federal Liberal Party