Despite being a former president still protected by a Secret Service detail, Donald Trump could see real time spent behind bars if a jury finds him guilty of falsifying business records in an effort to disguise payments to a former adult film star. And the odds grow worse for him should he decide to take the stand in Judge Juan Merchan’s courtroom sometime during the next six weeks the current trial is expected to last, according to attorney Norm Eisen. In a column for the New York Times, Eisen wrote that a survey of the history of other defendants who faced similar charges the former presiden…