The Liberals say Casey won the nomination for the federal riding of Cumberland-Colchester in Nova Scotia on Saturday afternoon.
Casey previously represented the riding for 17 years, first as a Tory and then as an independent before retiring from politics in 2009.
He was kicked out of the Conservative caucus in 2007 when he voted against the budget.
In a press release Casey says the Liberal Party represents his values and priorities.
The Cumberland-Colchester riding is currently held by Conservative Scott Armstrong.
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