ObamaCare enrollment spiked in March, and a total of 5 million people have signed up since the insurance marketplaces launched in October, Centers for Medicare and Medicaid Services Administrator Marilyn Tavenner wrote in a blog post Monday. Less than a week ago, the administration said 4.2 million had signed up for coverage through the end of February, meaning that about 800,000 people have enrolled so far in March. That's good news for the Obama administration; the number of enrollments had fallen from 1.1 million in January to 942,000 in February.
