Reuters: The United States will insist on strong protections for the environment and for workers in future trade deals, President-elect Barack Obama said on Friday as he introduced his nominee to be chief U.S. trade negotiator. Former Dallas Mayor Ron Kirk “will help make sure that any agreement I sign as president protects the rights of all workers, promotes the interests of all Americans, strengthens American businesses, and preserves the planet we all share,” Obama said at a news conference …