Is the Democratic Party doomed (long term)

[100% pro-life no matter what]

Looking at the way that those under 30 vote, I don't see how you could argue that it's the Democrats who are doomed. I don't buy the whole "mid-90s kids will vote Republican." It's not really backed up by any evidence.

In the short term, the real argument is 1997-2005 kids will vote 55% Republican.

Yes, the most diverse and liberal generation in history is going to vote 55% Republican. Definitely.

Not every generation gets progressively more liberal.  If so, our country wouldn't be in a much more conservative place today than in 1970.  In fact, there is some evidence that today's college students are much more conservative than those of five years ago.

There was an interesting article today about how the Democrats are doomed:
http://www.vox.com/2015/10/19/9565119/democrats-in-deep-trouble

[100% pro-life no matter what]

I'd be curious to see actual polls, but my anecdotal experience has given me the impression that older millennials (let's say 25 and up now) are much more loyal to Democrats than younger ones (let's say under 22?), who definitely seem to be more split.

I wouldn't say that this bit in particular is anecdotal - those who came of age during the Bush years and very early Obama years are far more Democratic leaning than those who came of age after, say, 2011/12.

I have been consistently maintaining that 2016 is going to see a huge gap between the 18-24 vote and the 25-29 vote.  Probably something like a tie in 18-24 and 60-38-ish in 25-29.