Source:
CNN.com Recent polls show Bernie Sanders leading Hillary Clinton in both New Hampshire and in Iowa. CNN's Brianna Keilar reports.
Read more:
http://www.cnn.com/videos/us/2016/01/12/could-hillary-lose-to-sanders-keilar-dnt-lead.cnn
As for other mainstream headlines
ABC: New Polls Concern Clinton Campaign
http://abcnews.go.com/WNT/video/polls-concern-clinton-campaign-36202212
MSNBC Despite polling, uncertainty is the only thing certain in Democratic race
http://www.msnbc.com/msnbc/polls-take-democratic-primary-and-wild-ride
"few expected a septuagenarian democratic socialist would force Clinton to send such dire warnings to her supporters."
NBC News : Poll: Neck-And-Neck 2016 Races in Iowa, New Hampshire
Sanders outperforms Clinton in general-election matchups
http://www.nbcnews.com/meet-the-press/poll-neck-neck-2016-races-iowa-new-hampshire-n493361
The NBC/WSJ/Marist polls also show that Sanders outperforms Clinton in hypothetical general-election matchups in these two presidential battleground states - something other surveys have found, too.
CBS: NH Poll: Bernie Sanders leads Hillary Clinton in every major voting bloc
http://www.cbsnews.com/news/nh-poll-bernie-sanders-leads-every-major-voting-bloc/
CBS: Trump: Clinton having "tough time" against Sanders in 2016 race
http://www.cbsnews.com/news/trump-clinton-having-tough-time-against-sanders-in-2016-race/
Beyond the tightening polls. This is not good for the Clinton campaign when they start to see headlines like that on the mainstream news sites and their videos .
Hat tip to Bernie's campaign who have done precisely what they had to to this point - get within striking distance on New Hampshire (which they've exceeded) and Iowa (which is now a true toss up with momentum in Sanders corner).
There's little doubt that this race has changed and Bernie's very, very much in it now.