A mail and a video. So Barack Obama, twenty months exactly from the presidential 2012, opened the campaign for reelection to the White House. The Web opens confident, the same tool that made its fortune four years ago. In the email, the president writes of "not wanting to go with expensive TV ads or lavish excesses, but you - the people who are organized in the neighborhoods, talking with neighbors, colleagues and friends." The video, titled "It Begins With Us" does just that.