WASHINGTON – The Supreme Court on Tuesday upheld Michigan’s ban on using race as a factor in college admissions. Three years later, affirmative action opponents persuaded Michigan voters to change the state constitution to outlaw any consideration of race. Circuit Court of Appeals said the issue was not affirmative action, but the way in which its opponents went about trying to bar it. Similar voter-approved initiatives banning affirmative action in education are in place in California and Washington state. The case was the court’s second involving affirmative action in as many years.