Amid controversy, OC Transpo in Ottawa, Ontario, has refused to run a political advertisement on its transit shelters.
The ad, centered on Ontario Premier Dalton McGuinty, was commissioned by a local union, which says the city's decision not to run the ad is a violation of its democratic right to freedom of speech.
Although the ad has been banned from bus shelters, commuters will be able to catch a glimpse of it on five billboards around the city.
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