Election officials have determined that former Sen. Evan Bayh is considered an "inactive" voter in Indiana, as he seeks to reclaim win back his Senate seat amid charges he left the state after retiring from Congress in 2011.

As first reported by CNN, Bayh has been listed as an inactive voter twice. The first time was in July 2014 ahead of the midterm elections, with the most recent instance coming just last week. According to the report, elections officials twice sent postcards to Bayh's property in Indianapolis to determine residency, both of which never received a response.

Since suddenly announcing a bid for Senate in early July, Bayh has been dogged with allegations of leaving the state and taking up residency in Washington D.C., where he owns two multi-million dollar homes. The only home he owns in Indiana is a $53,000 condo in Indianapolis.

The former Indiana governor and senator is still considered a registered voter in the state, even though being listed as inactive is the first step to being removed as a voter.

Similar allegations hurt former Indiana Sen. Richard Lugar in 2012 after it emerged that he did not own a home in Indiana. He ultimately lost his primary contest to Richard Mourdock.

Rep. Todd Young's campaign and state Republicans have hammered Bayh over the issue, particularly after he claimed that he "never left" the state after his Senate departure.