An Indiana elections board declared Sen. Richard Lugar (R-Ind.) ineligible to vote at the address hed been registered at, as he hasnt lived there in decades.

The Democratic-controlled board voted along party lines to bar Lugar from voting there. The decision will have almost no impact on Lugars ability to vote: He will likely be able to register at another address, either the home of a relative or at a farm he owns in the state.

But the decision could further hurt him in his primary race against Indiana state Treasurer Richard Mourdock (R) because it draws more attention to the fact that his primary home is in the Washington suburbs.

Lugar is facing a tough challenge from Mourdock, who has Tea Party support and was recently endorsed by the National Rifle Association.

Lugars voting ineligibility was first reported by The Indianapolis Star.