Story highlights The Cleveland politician and former mayor has filed to run

He mounted two unsuccessful bids for president, in 2004 and 2008

Washington (CNN) Former Rep. Dennis Kucinich of Ohio on Monday filed his candidacy for governor, the Ohio secretary of state's office said, marking a return to politics for the former Democratic presidential candidate.

Sam Rossi, press secretary for the Ohio secretary of state, provided CNN a copy of Kucinich's filing.

Kucinich spokesman Andy Juniewicz said in a statement Tuesday that the paperwork establishing a campaign committee was not Kucinich's formal declaration and that the former congressman had yet to make an official announcement.

"Over the next several days, we will be providing additional information regarding further developments," Juniewicz said.

Kucinich , a Cleveland politician and former mayor, gained national attention for his liberal positions and outspoken anti-war message, as well as his offbeat style.

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