"The security protocols we already have in place made us aware of these attempted intrusions by Russian IP addresses throughout the course of the 2016 election", Wyman said.
Iowa Secretary of State Paul Pate says the federal government contacted his office Friday to confirm the attempt.
State election officials are demanding a $12,500 fee.
The Department of Homeland Security confirmed it had notified the 21 states but declined to identify them Friday.
Trump says democracy must be restored in Venezuela soon
General Assembly, Trump said the Venezuelan people were starving and their country, once one of the wealthiest, was collapsing. At a dinner with Latin American leaders on the fringes of the U.N.
The only aspect of Maine's election system that is accessible via the internet is the Central Voter Registration database, and it is protected by user passwords, a firewall and regular monitoring by in-house cybersecurity staff, the department said. Officials said there were some attempts to compromise networks but most were unsuccessful.
IN got better news, with DHS reporting it had not detected any Russian attempts to hack into the state's voter registration systems, according to Valerie Warycha, deputy chief of staff for Secretary of State Connie Lawson. The majority of the efforts found by DHS were scanning, but not breaches, and the officials stressed that there was "no evidence of any impact to voting anywhere", the news release said. I wouldn't call it a probe.
The disclosure to the states comes as a special counsel probes whether there was any coordination during the 2016 presidential campaign between Russian Federation and associates of Donald Trump. He says Russian President Vladimir Putin "vehemently denied" the conclusions of American intelligence agencies.