TORONTO and OTTAWA — The Canadian Imperial Bank of Commerce has turned over an e-mail received from Liberal MP Scott Brison to police and regulators as part of a probe into the income-trust controversy that dogged the Liberals in the recent election campaign, The Globe and Mail has learned. Sources said the former public works minister, a potential contender for the Liberal leadership, sent an e-mail to one of CIBC's employees the day before Ottawa announced its much-anticipated policy on income trusts last November, in which he suggested the recipient would likely be pleased by the decision. The bank did...