Student visa applicants will need to set their social media accounts to public as part of the Trump administration’s enhanced vetting of foreign nationals seeking to study in the US. The accounts will be scrutinized for “any indications of hostility towards the citizens, culture, government, institutions or founding principles of the United States,” according to a diplomatic cable sent by the State Department to embassies and consulates Wednesday. The cable, obtained by multiple outlets, further instructs diplomatic officials to look for any “advocacy for, aid or support for foreign terrorists and other threats to US national security” and “support for...