| Mr Obama and Mr Trump met at the White House two days after the election |
US President Barack Obama has said
he may speak out after leaving office if he feels his successor Donald
Trump is threatening core American values.
| Mr Obama spoke at a news conference at the Apec Summit in Lima, Peru |
But, he added, if an issue "goes to core questions about our values and our ideals, and if I think that it's necessary or helpful for me to defend those ideals, then I'll examine it when it comes".
The president described himself as an "American citizen who cares deeply about our country".
Speaking at a news conference to mark the end of the Asia-Pacific Economic Cooperation (Apec) summit, Mr Obama reiterated that he would extend to Mr Trump's incoming administration the same professional courtesy shown to his team by his predecessor George W Bush.
Mr Bush has refrained since leaving office from commenting on Mr Obama's presidency. "I don't think it does any good," he told CNN in 2013, after Mr Obama was elected for a second time.
"It's a hard job. He's got plenty on his agenda. It's difficult. A former president doesn't need to make it any harder. Other presidents have taken different decisions; that's mine."