Wasn’t worried about national security then, won’t be if elected either….
Check it out:

If former Secretary of State Hillary Clinton had top secret information on her private email server, there is no shortage of precedent under the current administration indicating what could happen.

The most common frame of reference — the case of former CIA Director David Petraeus — is far from the only example of the Obama administration prosecuting government officials — typically lower and midlevel government officials — for mishandling classified information under provisions of the Espionage Act, which can carry sentences of up to 10 years imprisonment for the most serious offenses, though generally involve fines.