Section 240A(b)(1) of the INA provides that the DHS may cancel the removal of an inadmissible or deportable alien who: 1. has been physically present in the United States for a continuous period of not less than ten years immediately preceding the date of such application; 2. has been a person of good moral character during such period; 3. has not been convicted of certain offenses under the INA; and 4. establishes that removal would result in exceptional