"There are times where I've fallen off the wagon," the president-elect said when asked in a television interview whether he has kicked the habit.
"I've done a terrific job, under the circumstances, of making myself much healthier," he said. "And I think that you will not see any violations of these rules in the White House," he said on Sunday's "Meet the Press" on NBC.
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Obama told the magazine Men's Health in an interview for its November issue that he wished he had more time for staying fit and that he still occasionally smoked a cigarette.
Obama said in that interview that he had bummed a cigarette a couple of times during the campaign. "But I figure, seeing as I'm running for president, I need to cut myself a little slack," he said.