Hillary launched on April 12, 2015.
She launched in April... and her private server became public knowledge in March 2015...
MARCH 2015 : (HILLARY CLINTON’S PRIVATE SERVER BECOMES PUBLIC KNOWLEDGE; DAYS AFTER THAT REVELATION, JILL MCCABE, WIFE OF THE FBI’S ANDREW MCCABE, IS APPROACHED BY TERRY MCAULIFFE ABOUT RUNNING FOR OFFICE )