OK, that may be doing both of them a bit of a disservice, but that really is what he's best known for in the UK - he presented an arts programme here for a few years:
Michael Grant Ignatieff, MP (/ɪgˈna.tʃəf/; born May 12, 1947) is a public intellectual, historian, and Canadian politician. He has held academic positions at Cambridge, Oxford, Harvard and the University of Toronto. An award-winning author, he has also worked as a journalist and documentary filmmaker.
Ignatieff was based in the United Kingdom from 1978 to 2000. During this time he was on the staff at both the University of Cambridge and the University of Oxford and worked as a film-maker and political commentator for the BBC. He lived in the United States from 2000 to 2005; there, he was director of Harvard's Carr Center for Human Rights Policy. He returned to Canada in 2005 and took a position as a visiting professor and senior fellow of the Munk Centre for International Studies at Toronto.<1> In November, 2005 he was heralded as a possible Liberal candidate for the next federal election.
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While living in the United Kingdom, Ignatieff became well known as a broadcaster on radio and television. His best known television work has been Voices on Channel 4, the BBC 2 discussion programme "Thinking Aloud" and BBC 2's arts programme, The Late Show. His documentary series Blood and Belonging: Journeys into the New Nationalism aired on BBC in 1993. He was also an editorial columnist for The Observer from 1990 to 1993.
http://en.wikipedia.org/wiki/Michael_IgnatieffControversially, he was in favour of the Iraq war. It'll be interesting to see if Canadians think he spent a little too much time abroad to be ready to lead the country yet. He's probably the most 'international' figure ever who may end up leading a major country.