According to the international understanding and commitment, Head of the States, for example the Presidents can not be trialed under any criminal offense during their tenure. Neither new trial can be initiated and existing trials in the court to be put on hold.
On the other hand, the constitution of the United States of America says, under Article IV, Section 4 provides for the removal of the president and other federal officers. The president is removed on impeachment for, and conviction of, treason, bribery, or other high crimes and misdemeanors.
Posted Status in Law