MADISON, Wis. (AP) – Gov. Scott Walker is telling Wisconsin’s American Indian tribes he will sign a bill that will make it harder to force public schools to drop Indian nicknames. Walker sent a letter to tribal leaders Thursday morning telling them he will sign the measure. He says he shares concerns about tribal mascots and nicknames in Wisconsin and across the country but is worried current state law infringes on free speech. He says a person’s right to speak doesn’t end just because what they say is offensive.  He says the best route is to educate people about how some phrases and symbols are offensive when used as nicknames and mascots. Walker’s deadline to sign or veto the bill is Thursday. If he were to take no action, the bill would become law.