The 50 Year Strategy: A New Progressive Era (No, Really!), from Mother Jones, via Jason:

The other massive trend transforming politics is the changing composition of the electorate. Some shifts, such as the exodus to the sub- and exurbs, to the South and West, the aging of the baby boom generation, and the shift from industrial to a digital culture, have been much discussed.

Others, like the emergence of the millennial generation, the boomer babies and young immigrants born from 1978 to 1996, are less well known. They number approximately 80 million, 3 million more than their parents' generation, and we should expect to see them transform society, culture, media, and politics just as profoundly. They are the most diverse American generation ever, with nearly 40 percent from minority groups; chances are that within their lifetime, the term "majority" will become almost meaningless when applied to race.

Already, indications are that this generation is politically engaged, votes in high numbers, and leans overwhelmingly Democratic. In 2004, people age 29 and under would have given Kerry a landslide of 372 electoral votes had they been the only ones voting. In the 2006 congressional election, that same age group went for Democrats over Republicans by 22 percent—an almost unheard-of margin. Conventional wisdom has it that if a generation votes for one party in three consecutive elections, it tends to stay with that party for life. If that's true, the stakes are high for 2008.