The LA Times reports here:
Students for Trump began as a Twitter account in October in a dorm room at Campbell University in Buies Creek, N.C. Ryan Fournier, a freshman and early supporter of Rand Paul, was drawn to Trump's blunt rhetoric and policies on border control and employment. ... More than 5,000 students in 200 chapters in 38 states are publicly on board. Fifteen chapters have taken hold in California, on campuses including UC Santa Barbara and USC.
