Partisan Polarization Surges in Bush, Obama Years

Trends in American Values: 1987-2012

Amid slowing immigration to the United States, there has been a modest shift in views of immigrants. While most Americans still back tighter restrictions on people entering this country, the percentage expressing this view is declining. At the same time, the public is divided over whether the growing number of newcomers from other countries threaten traditional American customs and values. As many now disagree (48%) as agree (46%) with this point of view. Three years ago, a narrow 51%-43% majority saw newcomers as a threat to traditional American values.

http://www.people-press.org/2012/06/04/section-8-values-about-immigration-and-race/