that subpoena was not served on donald trump. it was served on the accounting firm mazars, which is prepared those tax returns and has copies of them. the manhattan district attorney is conducting an investigation into potential criminal wrongdoing by donald trump and his company in the hush money payments to stormy daniels in the last month of the presidential campaign, which federal prosecutors in new york called a criminal conspiracy against the united states, which was designed to affect the election. the president's lawyers don't point to a single line in the constitution to support their position because there is no line in the constitution that says the president is not subject to criminal process. in fact, the supreme court ruled that president richard nixon was subject to criminal process when they voted unanimously to enforce a criminal subpoena issued by a special prosecutor who was conducting a criminal investigation of president nixon. president nixon then complied with the subpoena and handed