Obama said this several weeks ago as well
Draw a line in the snow.
Back when Republicans were concerned voting machines were defaulting to “Democrat” or changing votes to D, CNN said hacking wasn’t possible - but Obama had rapid response teams to act if they suspected Republicans were manipulating the election or intimidating voters.
No, the presidential election can’t be hacked
http://www.cnn.com/2016/10/19/politics/election-day-russia-hacking-explained/