Ukrainian hackers have released documents from a second email account "linked" to Putin aide Vladislav Surkov. Like earlier leaks, they purport to show aggressive Russian designs against Ukraine.
Russian election hacking is of course a matter of concern in the US, but it's also prompted tighter cyber security in Montenegro, whose government plans upgrades after Russian operators' suspected interference with election sites.
In the US, several concerns persist over tomorrow's elections. First, there's the prospect of direct manipulation of vote tallies by enemies both foreign (Russia) and domestic (choose your poison). Despite recent proofs-of-concept by Cylance and others, this is generally regarded as unlikely. Distributed denial-of-service attacks that might disrupt voting or delay counting are thought somewhat more likely. Finally, information operations designed to discredit the US electoral system are widely believed to be well underway. There's also Internet chatter suggesting that al Qaeda and (possibly) ISIS are seeking to inspire physical attacks on election-related targets.
There have been various dark hints about US retaliation against any Russian electoral hacking. The Russian press has reported US penetration of Russian critical infrastructure networks, and the Russian government has demanded an explanation. Guccifer 2.0 has called upon hacktivists to monitor US elections for voter fraud.
WikiLeaks released another tranche of leaked emails over the weekend and claims to have experienced a DDoS attack. The site was back up as of this writing.
Twitter also experienced an outage earlier today, but that appears to have been an engineering error, and not an attack.