© Reuters/Larry DowningU.S. Vice President Joseph Biden.
Biden presented his apology in a phone call to Erdogan on Saturday, the White House said.
Speaking at Harvard University on Thursday, Biden claimed that "President Erdogan told me, he is an old friend, said you were right, we let too many people through, now we are trying to seal the border."
Responding to the remark, Erdogan said he "never admitted any mistakes."
"If Biden told these words, then he will be history to me. I never uttered such remarks," the Turkish leader said. "He should apologize. I'm saying this clearly. And we won't accept slender, indirect explanations."
During the phone call with Erdogan, Biden "apologized for any implication that Turkey or other allies and partners in the region had intentionally supplied or facilitated the growth of ISIL (IS, ISIS) or other violent extremists in Syria," the White House said.
On Thursday, Biden blamed America's allies in the region - Turkey, Saudi Arabia, and the United Arab Emirates - for allowing the rise of the Islamic State, saying they supported extremists with money and weapons in their eagerness to oust the Assad regime in Syria.
Now that the US is trying to pin the blame on ISIS on everyone else to get home support for this new puppet war, the other formerly complicit leaders are reluctant to take the fall. So my next question is why now? What new information do the other countries possess or what potentially new course of action does it indicate for the countries that seemingly refuse to bend to this bad PR?
There is also the possibility that this is part of the grand plan to unite the world under one Western leader. I suppose one can only see where it leads from here.