Jennifer Rubin was hired by the Washington Post to be its “conservative” columnist, to counterbalance its liberal tilt on national issues. But then Rubin encountered Trump, and she was horrified by the hash this man made of her fiscally responsible, conservative principles. Here, she says that 'Trump is unraveling before our eyes. His mental instability has become too glaring to ignore.“ He is increasingly incoherent. “In the past 24 hours, Trump — who will be 74 in November 2020 and is “tired,” according to aides — has: Falsely declared multiple times that his father was born in Germany. (Fred Trump was born in New York.)Declared that wind turbines cause cancer.Confused “origins” and “oranges” in asking reporters to look into the “oranges of the Mueller report.”Told Republicans to be more “paranoid” about vote-counting.