the ongoing legal battle. On October 10, Koenig announced that the tape had not been altered in any way, contrary to the claims by Stephen Harper that it had been altered. Canadian involvement in Afghanistan The ongoing involvement of the Canadian Forces in Afghanistan may also influence voters. Desmond Morton, a political science professor at McGill University suggested that the Conservatives could be blamed for the war because they have extended the mission twice, despite the fact that it was then Liberal Leader Jean Chrétien who was Canada's prime minister when Canada's current military involvement in Afghanistan first started in 2001. Both the Conservatives and Liberals have at various times agreed to extend the mission(s) to at least 2011, so this may result in some Canadians who are strongly against Canada's ongoing involvement, who might have otherwise typically voted either Liberal or Conservative in the past, to take their votes elsewhere in 2008. Cities and infrastructure Toronto Mayor David Miller has spoken out that the parties need to focus more on cities and their infrastructure, stating that 8 out of 10 Canadians live in cities, and that so far only the Green party has revealed a platform on the issue, with a national transit strategy and plans to give cities a permanent revenue source to help fix a growing infrastructure backlog. Miller stated he will not endorse a specific party, but urges people to choose a party that will "help cities thrive". He disagrees with Stephen Harper's opinion that "cities are not of national importance". On September 18, Stéphane Dion pledged to spend more than $70 billion over the next 10 years to improve Canada's infrastructure if elected, and budget surpluses that exceed a $3-billion contingency fund to infrastructure projects, particularly those with a green focus, calling Canada's cities and towns "the engines of our economy". Stephen Harper immediately lashed out at the spending proposal, saying Dion was "promising money no government could afford" and that the Conservative's infrastructure plans "are modest and affordable within the four-year budget we've published". On September 23, Montreal and Toronto mayors Gérald Tremblay and David Miller laid out their demands for urban municipalities, describing cities' current financial problems as a national issue, saying that cities have become the country's economic, social and cultural development engines and need appropriate support, and that they need better "fiscal tools" to continue their role as Canada's economic engines