President Obama intends to make free trade a major goal this year, and few policies would do more to stimulate growth and create jobs at a time when too many Americans are still struggling to find work.But the president must show much more passion and persistence on this issue than he's demonstrated so far. He has to stand up to the labor unions and liberal interest groups which continue to mount a wrong-headed, backward-looking opposition to expanding foreign commerce.He can start by making trade a major theme of his State of the Union speech next week. The immediate issue is a bipartisan bill introduced earlier this month that would renew Trade Promotion Authority, commonly known as "fast track."