Several trends started in 2003 which suggested the end of the Liberal Party's political dominance. Notably, there would be a high turnover of permanent party leaders, in contrast to their predecessors who usually served over two or more elections, particularly Trudeau and Chrétien who each led for over a decade. The Liberals were also hampered by their inability to raise campaign money competitively after Chrétien passed a bill in 2003 which banned corporate donations, even though the Liberals had enjoyed by far the lion's share of this funding because of the then-divided opposition parties. It has been suggested that Chrétien, who had done nothing about election financing for his 10 years in office, could be seen as the idealist as he retired, while his rival and successor Paul Martin would have the burden of having to fight an election under the strict new rules. Simon Fraser University professor Doug McArthur has noted that Martin's leadership campaign used aggressive tactics for the 2003 leadership convention, in attempting to end the contest before it could start by giving the impression that his bid was too strong for any other candidate to beat. McArthur blamed Martin's tactics for the ongoing sag in Liberal fortunes, as it discouraged activists who were not on side.