David Letterman once again chided John McCain for skipping out on “Late Show with David Letterman” on Wednesday night — only to appear on “CBS Evening News with Katie Couric” at just the same time.

From the AP: Letterman “said he felt like a “patriot” to let McCain off his commitment to deal with the economy and “now I’m feeling like an ugly date.”

“”That’s what I feel like, I feel like an ugly date,” he said. “I feel used. I feel cheap. I feel sullied.””

He also got in a few digs about Sarah Palin. “Letterman said McCain taking Palin to meet world leaders at the United Nations was like “take-your-daughter-to-work day.”

The guest, ironically, was Paris Hilton (below), to whom Letterman said, “You had a little run-in with him, too, didn’t you?”