I'm here to plug one of those unique opportunities to make your voice heard - in conjunction with hundreds of thousands, maybe even millions, of others. It's something you can only do tomorrow. Hey, I know it's short notice. But this is easy. It's part of an under-the-radar movement that has been gaining steam for months. Tomorrow, send a red envelope to Barack Obama. His address is: President Barack Obama The White House 1600 Pennsylvania Ave. N.W. Washington, D.C. 20500 You own his house, so you should know. On the outside of the envelope, write: "This envelope represents one child...