06/16/2009 01:24 pm ET Updated May 25, 2011

Letterman Resists Making Joke About Palin Wanting Massive Pipeline

One day after apologizing to Alaska governor Sarah Palin about a controversial joke he made on his late-night program, comedian David Letterman has so far resisted the urge to make a joke about Gov Palin's desire for a massive pipeline, a source close to Mr. Letterman revealed today.

Ever since Governor Palin argued strongly last week in favor of the gas pipeline, which would be many miles in length, Mr. Letterman has been "strongly tempted" to make a wisecrack about the situation, the source said.

"Here you have the words 'Sarah Palin' and 'massive pipeline' in the same sentence," the source said. "If David were to leave that alone, it would almost be dereliction of duty."

According to the source, "David first wants to make sure that there's no confusion between a Palin pipeline and Piper Palin -- that would be a real headache."

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