Obama's statement on HCM isn't as much ignorance; as it is willful........Obama is a fan of the leftist historian Howard Zinn, who regularly promotes a phony view (radical left) of American history.......largely Anti-American...much like Obama's world view.
Zinn has bee discredit so often it is laughable that he is allowed near a classroom !
No surprise that Obama expressed "special interest" in the work of Zinn........