He said (paraphrased), that Trump is saying the same things as the rest of the republican candidates -- just in more interesting ways.
I'd say that this applies to most if not the entire republican party. The racism is no longer dog whistle. The only real change Trump brings to the table, in the opinion of many, is that he's thrown the dog whistle away.
Listen to the President's opinion for yourself.
(From February 2016)
"In this clip, [more recent clip] President Obama destroys the absurd narrative that somehow he's to blame for the rise of Donald Trump and the implosion of the Republican Party. Our noble president has been blamed by Republicans for pretty much everything that's gone wrong over the past eight years, while all of his accomplishments are tarnished and discounted - but even this is a stretch."
PRESIDENT OBAMA ON REPUBLICANS CREATION OF TRUMP
FROM MARCH 2016