By Tom Boggioni Appearing on MSNBC on Sunday afternoon with host Lindsey Reiser, Donald Trump biographer Tim O’Brien said the former president can’t be pleased that former members of his cabinet are speaking privately with investigators working for the House Jan 6 committee looking into the Capitol insurrection. Reacting to reports that former secretary of state Mike Pompeo might join ex-Treasury secretary Steve Mnuchin, former Education Department head Betsy DeVos and Mick Mulvaney voluntarily testifying, O’Brien said Trump is likely “rattled”by the news. As host Reiser noted, questions about…