Kevin Counihan

The man who until last week headed the federal Obamacare marketplace said the Trump administration killed advertising and outreach for that exchange intentionally "to suppress enrollment" in Obamacare plans.

Former HealthCare.gov CEO Kevin Counihan also told CNBC that the abrupt move by the Trump administration on Thursday could depress sign-ups on that exchange by several hundred thousand people below what would otherwise be expected in the final week of open enrollment, which ends next Tuesday.