Macro Idea 3. Come out against Bush's Immigration Bill. This is hugely unpopular. Most americans outside the blogosphere heavily oppose it. Union workers seem unhappy with it. Americans (outside the blogosphere) instinctively don't believe in rewarding illegal behavior with citizenship. This would bring lots of free press for Edwards and distinguishes him from others on the Democratic side. I'm fairly certain this wouldn't lose any votes in Iowa or NH or SC.
micro This can simultaneoulsy be opposed on humanitarian and populist ideals. It is highly unlikely and kind of mean to expect families to split up to follow Bush's bill. Further I think many people are worried about wage issues. The biggest pushers of this bill are multinational corporations who want more H1B visas, and the Chamber of Commerce PAC that want cheap labor. This reinforces good issues for Edwards.