Oh, look, it's another one of those "the Republicans are doomed long-term" threads that are so popular on JREF. What I do find amusing about this one is this bit:
Why do I find that amusing? Because back in the late 1960s and early 1970s, the Baby Boomers were supposed to be the demographic trend that was going to lead the Democrats to victory for decades. In fact, Lanny Davis wrote a book in 1974 called The Emerging Democratic Majority based on this thesis. It didn't happen then. In 2002, Ruy Texiera and John Judis dusted off that title for a new book, with similar themes to that discussed in the NPR piece. They may have looked pretty good in 2006 and 2008, but they didn't exactly ring the bell in 2004 or 2010.
The demographic problem that the Democrats face is an aging population. People generally become more conservative as they age. Not everyone, certainly, but in any large group it's pretty consistent, even among minorities.