Yeb is an elitist ,cultural marxist. In his world the rulers arent to be blamed. The people are.
You have to read more than the headline.
He's saying he'll take responsibility for what happens during his administration, rather than blame the guy who came before him for things that go wrong during his administration (as Obama does).
Whether or not he'll do that, whether or not it's something presidents should do, whether or not it's something he should be saying now, what he said doesn't amount to the things people are assuming that he said.
Whether or not he'll really behave that way, what he's saying is the opposite of what you wrote. He's saying rulers are to be blamed for things that happen when they're in charge.