Palin was referring to Bill Ayers, one of the founders of the group the Weather Underground. The group took credit for bombings, including nonfatal explosions at the Pentagon and the U.S. Capitol four decades ago.

In remarks to GOP donors in Englewood, Colo., on Saturday, Palin said Obama seems to see the U.S. as being so imperfect that, in her words, "he's palling around with terrorists who would target their own country."

Obama served on a charity board with Ayers in Chicago and has denounced his past activities.
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