It's not uncommon to describe politics in terms of poker, especially when discussing campaigns and the strategies candidates employ when trying to win elections.
Like poker, an election is a "zero-sum" game in which each vote gained by one candidate represents one lost by another. If you think about it, nearly every "move" made in a campaign could be said to suggest a similar strategy from poker.
Like poker players, candidates are working to establish their credibility, building (and exploiting) their images, making reads of their opponents' strength and/or weakness and weighing risks versus rewards. We also see a lot of what might be called "angle-shooting" in campaigns and a whole lot of bluffing, too.