A new Obama administration privacy policy released Friday explains how the government will gather the user data of online visitors to WhiteHouse.gov, mobile apps and social media sites, and it clarifies that online comments, whether tirades or tributes, are in the open domain.

A new Obama administration privacy policy out Friday explains how the government will gather the user data of online visitors to WhiteHouse.gov, mobile apps and social media sites. It also clarifies that online comments, whether tirades or tributes, are in the open domain.