More than three-quarters (77 percent) of white Americans report that their core social network includes only people who are also white. More than six in 10 (64 percent) black Americans have social networks composed entirely of people who are also black. Less than half of Asian Americans (49 percent) and Hispanic Americans (43 percent) have core social networks that include only members of their own race or ethnic background.
Most partisans have close social ties that reflect their political predispositions. A majority (54 percent) of Republicans report that their core social network is exclusively composed of Donald Trump supporters. The pattern is nearly identical among Democrats.
Recall the cliche that you are the average of your five closest friends.