They have nothing to do together. Some awful people just use his name to cheat search engines, I suppose. I got this weekly Google Alerts in my mailbox (Yes, I stalk myself! :>):
That blog's name is Barack Obama, but have posts like "Euro Million lottrey award 2008". Here is the screenshot of the link in alert:

This blog puts Barack Obama's stuff before and after those posts. Note that there are many unreachable mailboxes. Must be a dumb spammer's work. I have flagged that blog, hope it will be taken down and very soon.

I have never seen any spam mail about this in my gmail mailbox, good job gmail!

PS. I just notice there is a spelling mistake (or intended?) in lottrey.