Other observers have raised concerns that social media also has contributed to deepening the divide between Americans, with people steering their peers toward partisan news sources that bolster - rather than challenge - their points of view. Young adults may be particularly vulnerable to that kind of filtering: About a third of 18- to 29-year-olds the Pew Research Center surveyed this year reported that they "often" get news from social media. Just 10 percent of people in that age group said they trust the national media "a lot," the lowest proportion of any generation surveyed.