Donald Trump’s estranged niece Mary Trump claimed Thursday on MSNBC’s “The Last Word” that the former president has “untreated psychiatric disorders.” Trump said, “This is a person who has untreated psychiatric disorders. And any untreated disorder of any kind of worsens over time, as long as it remains untreated. So, it makes perfect sense that somebody who is as unhealthy as he is, who is under the extraordinary amount of stress he is under, would have a harder time holding it together cognitively.” She continued, “Donald was always quite good when he was younger at sticking to a point. And...