With a Senate Intelligence Committee meeting set for Wednesday morning, Vice Chairman Mark Warner is pressing Department of Homeland Security Secretary John Kelly to fully disclose the extent of attempts by Russia to interfere with the 2016 election by hacking into local election systems.

Warner referenced an incident that occurred in Gila County last June in the letter. Matthew Roberts, spokesman for Arizona’s Secretary of State Office, says the hacker did not get access to voter database records.

“Last year someone attempted to access the statewide voter registration database, but they were unsuccessful," Roberts said. "Someone had hacked a local computer in one of the counties but were never able to get into the registration database.”

Warner said in the letter that though the 2016 attempts didn’t work he is worried about the 2018 midterm election cycle and even certain elections, which are happening in his state of Virginia this year.