VANCOUVER, British Columbia (Reuters) - A judge rejected a U.S. request that a Canadian marijuana activist be held without bail on Tuesday in a case that is likely to ignite debate over the countries' diverging drug policies. U.S. officials say Marc Emery illegally sold millions of dollars worth of marijuana seeds, but Emery's supporters say his business activities were well known for years and tolerated by groups that included Canada's federal health ministry. Emery is a founder of the pro-legalization B.C. Marijuana Party and his arrest comes as the Canadian government is pushing a measure to decriminalize possession of small...