Outgoing U.S. President Barack Obama has told incoming President Donald Trump to accept the fact that there is only one U.S. President at a time.
Obama also told the president-elect that he remains the U.S. President till Jan. 20, 2017 , when he would complete his two-term presidency of the U.S. and handover to Trump.
Obama’s remarks followed what the White House termed as Trump’s undue interference in U.S. policies since his election. Also ther president-elect had on Thursday, directed the U.S. Ambassador to the UN, Ms Samantha Power, to veto the Security Council’s Resolution on Israeli settlements in Palestinian territory.
However, the Obama’s administration disregarded Trump’s directive and had gone ahead to abstain from voting on the resolution when it finally came up on Friday, drawing criticisms from the president-elect and his team.
The White House, in a response by Obama’s Deputy National Security Advisor for Strat... Read more@ http://www.matoblog.ml/2016/12/there-is-only-1-us-president-i-am-till.html?m=1

Well he need to wait till his swearing in, though it is not easy to win a ruling party

Obama has been very matured in dealing with Trump's overzealousness. For him to have said this out loud means he's pretty pissed off to a breaking point.

They should not hand over power to Trump. If they do, we are doomed. The man is insane.