Not sure about Canada, but this is not true of US law. T-shirts are salable goods, not a source of news information.I think you can use their name as your T-shirt is protected just like a newspaper.
Slippery slope. Political figures do not give up their Right of Publicity. They can sue if they choose to. They just usually choose not to. Fine line, but important to understand the risks and not just make assumptions.pretty much political figures are open game.
I think you may be confusing Right to Privacy and Right of Publicity.there is not much they can do to you unless you pose a threat. even the guy that had a palin dummy hanging in a noose at his house couldn't be touched.
Sarah Palin effigy hung by noose in Halloween display - Telegraph