The 1993 Conservative Federal campaign was an unmitigated disaster for all concerned, including Gregg. Other campaign leaders complained that his many duties meant he missed too many meetings. Gregg again pushed for negative tactics, crafting an attack ad one of which Canadians found especially distasteful and offensive. The ad ridiculed a facial deformity of Liberal leader Jean Chrétien which was a result of a childhood polio infection. This ad backfired and the Conservatives were reduced to two seats in the House of Commons of Canada from their previous 151 seats. This was the result of a number of factors, including the intense unpopularity of former Conservative Prime Minister Brian Mulroney. His party suffered the worst defeat ever in Canadian history for an incumbent federal party.