- White House: 12.2 Million Enroll in Obamacare for 2017 The Hill by Jessie Hellmann—About 12.2 million people signed up for Obamacare plans during the 2017 enrollment period, the Trump administration announced Wednesday. The total falls short of the Obama administration's projected signups of 13.8 million people and is slightly down from the 2016 enrollment period, when 12.7 million people signed up for plans. Democrats accused the Trump administration of sabotaging enrollment when it pulled $5 million in ads that were to air in the final weeks of open enrollment.