Don't let that get in the way of smearing the Founders. 
Obama (and some here) are under the impression that the Founders all thought and acted alike. That's like saying everybody in Congress think and act alike.
That is total BS.
They had to agree on common things to enact laws for this country, and to compromise on some. Otherwise, no country would be created.
By and large, those who fought to defend slavery later became Democrats.
Although slavery no longer exists, the Democrat party remains.
Obama conveiently forgot to mention that.
That should tell you something.