In the social sciences, is it easier to get a post doc than a PhD? I am completing a PhD in Global Studies in Germany, and would like to apply for a post doc in North America, especially Canada. However, I am not sure if there is funding for post docs in the social sciences. For international students is it easier to apply for a PhD than for a post doc?
 I have a publication in an edited book from a prestigious publisher, another in English in a peer reviewed journal published from Germany.
If you already have a PhD, the chances of being admitted into a second PhD program are quite low, I would imagine. Furthermore, I would not recommend such a strategy: the possibility of being labeled as a "perpetual student" could have negative ramifications on one's career.

That said, there is funding for post-doctoral associates in addition to graduate students, even in the social sciences; in particular, there are a number of fellowships that are designed specifically for postdoctoral candidates in the humanities and social sciences. Of course, there is relatively more funding for PhD's than for postdoctoral associates.