A Tea Party-affiliated group is airing a radio ad touting Republican City Councilman Charles Djou in his race for Hawaii's vacant U.S. House seat.

The ad, commissioned by Liberty First Political Action Committee, says Djou has never voted for a tax increase while on the council and asks listeners to send in their ballots in the all-mail election.

Voters should begin receiving ballots next week, and have until May 22 to return them to the state Office of Elections.

Liberty First describes itself as particularly opposed to incumbents who support "dangerous far-left healthcare legislation." Djou has voiced adamant opposition to the health care reform law recently signed by President Barack Obama.