“America’s top intelligence officials say he is highly unlikely to be able to alter the results. But they expect Russian hackers, or others, to try to disrupt the process — perhaps to help Donald J. Trump, but more likely to simply undercut what Mr. Putin views as America’s holier-than-thou attitudes about its democratic procedures.
The Obama administration has concluded that much of the email hacking that has roiled the campaign was almost certainly approved by the Russian leadership. More recent activity — including the probing of registration rolls in several states — might be the work of independent Russian hackers, it says. While no one knows what to expect before the polls close, a tight race is more susceptible to mischief.”
Source: Five Possible Hacks to Worry About Before Election Day – The New York Times