“I screwed up,” Senator John McCain told David Letterman as he taped an appearance on Letterman’s CBS program, The Late Show, explaining his cancellation a few weeks ago.  McCain originally was scheduled to appear on Letterman’s late night talk show on September 24, but canceled after he announced the suspension of his campaign to focus on the nation’s troubled economy.

At the time, McCain said he needed to return to Washington to help bring forth legislation to address the Wall Street meltdown. But that evening, McCain ended up staying in New York for several more hours including agreeing to an interview with CBS News’ Katie Couric.

Several other subjects were covered over the three-segment interview scheduled to air Thursday evening, including:  Joe the Plumber, Governor Sarah Palin and her comments about Barack Obama “palling with terrorists,” writes ABC News.

Read the full story here.