A North Carolina state legislator says he supports the military, but a flyer prepared by his campaign could lead some to question which country's.

Democrat Tim Spear's campaign has apologised after inadvertently sending voters a leaflet showing actors in World War II-era German uniforms.

The firm that produced the advert touting his support for the military has accepted blame, US media reported.

The state Republican Party obtained the flyer and distributed it to the media.....