He wouldn't, of course, be able to snap his fingers and throw his political rival behind bars. He would have to order his attorney general to appoint a special prosecutor, then count on that special prosecutor to agree with his assessment that Clinton's email practices violated criminal laws about mishandling classified information. And even if he did all that and Clinton was charged, she would still be afforded a trial, and Trump's special prosecutor would have to contend with evidence that led the original team of federal investigators to conclude there was not sufficient basis to believe a crime occurred.