"The survey conducted June 7-July 5 among 4,602 adults, including 3,834 registered voters, on Pew Research Center’s nationally representative American Trends Panel finds that large majorities of both Trump and Clinton supporters have friends who back their preferred candidates.
More than four-in-ten Trump supporters (44%) say they have a lot of close friends who back Trump, while another 38% say they have some friends who support him. Similarly, most Clinton supporters say they have a lot (41%) or some close friends (40%) who also express support for Clinton.
Clinton and Trump backers also are far more likely to talk about the election with those who favor “their” candidate than with those who back the opponent. In the survey, conducted before the party conventions, most voters (67%) say the election comes up in conversation at least somewhat often, but only 23% say it comes up very often."