In the USA we have strict eligibility requirements for government security clearances as well as policies for dealing with breaches of security and investigations into the validity of one's security clearance. These policies are much more important when it comes to those holding the highest levels of government office.
A few of the more serious violations include:
*Refusal to complete required security forms, releases, or provide full, frank and truthful answers to lawful questions in connection with a personnel security or trustworthiness determination.
*Illegal or unauthorized modification, destruction, manipulation, or denial of access to information residing on an information technology system;
read more at: http://melanie.deatrich.net/2016/05/13/clinton-petition-to-congress/