The folks at RealPolitik need your donations to help defray the costs for a license to distribute their daily comics. You can read about the whole thing here, which also is where you should donate.
And if your are not reading Realpolitik every day, you should be.
I read about their plight and wonder if they could have bypassed that whole ordeal by doing as you did in the preceding post and just attributing below each cartoon the site where such cartoon could be found.
Unfortunately Tiger the answer is No. We went through the whole deal with UComics laywers.