In a Facebook post, Dr. Duke supported Trump greatly, but later specified adamantly that he had yet to endorse the presidential candidate.
"I think he deserves a close look by those who believe the era of political correctness needs to come to an end," wrote Dr. Duke.
On CNN program, State of the Union, with Jake Tapper, Trump was asked if he disavowed the support of Dr. David Duke.
"Just so you understand, I don't know anything about David Duke, OK?" explained Trump. "I don't know anything about what you're even talking about with white supremacy or white supremacists. So I don't know. I don't know -- did he endorse me, or what's going on? Because I know nothing about David Duke; I know nothing about white supremacists."
Democrats and Republicans alike have slammed Trump for his not immediately denouncing and disavowing any connection to the KKK.
Many wonder if Trump was reticent to disavow Dr. Duke because caucuses in several key southern states are to vote in the coming days.
This is not the first white nationalistcontroversy Trump has faced on the presidential campaign trail.
"We don't need Muslims. We need smart, well-educated white people who will assimilate to our culture. Vote Trump," stated robotic phone calls to Iowa voters. The phone calls were paid for by a white nationalist Political Action Committee that supported Trump.
Trump immediately disavowed any knowledge or support of these calls.