Now he said he will not be lighting up in the smoke-free White House but he failed to give a straight answer when asked by Tom Brokaw on Sunday whether he had managed to quit smoking.
In a country where cigarettes are responsible for one in five deaths and smoking costs tens of billions of dollars in health care, the president-elect has been under pressure to set an example by giving up his reported two-decade-old habit.
The White House no-smoking rule was imposed by former First Lady Hillary Clinton, now Mr. Obama's nominee for secretary of state.