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Mike Duffy trial: Key players in the Senate expenses scandal

Embattled suspended Sen. Mike Duffy begins his trial on April 7 in Ottawa. Duffy's improper Senate expenses claims and a $90,000 cheque from the prime minister's former chief of staff erupted into a scandal that rocked the political establishment in 2013.

People in the highest echelons of Canadian government have been implicated in the controversy

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