 WASHINGTON (AP) — Beating expectations, President Barack Obama's health care overhaul was on track to sign up more than 7 million Americans for health insurance on deadline day Monday, government officials told The Associated Press. Today is the deadline to sign up for private heath insurance in the online markets created by President Obama's heath... (Associated Press) 
 
 People line up to enroll for health insurance at the Alamodome in San Antonio, Texas on Monday, March 31, 2014. Despite the apparent turnaround since the disastrous October launch of the exchanges, the future of Obamacare is uncertain. State-run exchange websites in places like California and Maryland also experienced some difficulties. Telephone call centers for the exchanges were swamped by consumers seeking help, as well. The vulnerability of Obama's signature domestic policy achievement was evident during the early hours of Monday morning, when HealthCare.gov went down due to what the White House described as a software error not related to traffic on the website. Those who don't get health benefits from their jobs or through a government program won't be able to purchase private health insurance until the next open enrollment period begins Nov. 15 for policies that will take effect on Jan. 1, 2015. Play Facebook 
 
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 36: The number of states served by the federal government's health insurance exchange website. The administration hasn't said how many of the 6 million people nationally who had signed up before the weekend ultimately closed the deal by paying their first month's premiums. Rules may vary in states running their own insurance marketplaces. Also, the new markets don't have a monopoly on health insurance. 9: The number of deadline extensions and rule exceptions the Obama administration has made to the health care law's rules since it was signed into law.
– Experts didn't think the White House could reach a goal of 7 million ObamaCare signups as of yesterday—but it looks like their forecasts were wrong. Officials say the administration was on track to receive more than 7 million signups, in line with the original Congressional Budget Office target numbers. That target had earlier been shrunk to 6 million following HealthCare.gov's troubled debut, the AP notes. Still, among the 7 million, it's uncertain how many had previously lacked any coverage; it also remains to be seen how many new enrollees complete the process by actually paying their first premiums. "It's kind of the lead-up to Christmas right now, and all the last-minute shoppers are out," one health insurance marketer tells the Huffington Post of yesterday's flurry of new enrollees. The huge volume resulted in headaches and came amid site glitches, as HealthCare.gov struggled to keep up with traffic that at times topped 125,000 simultaneous visitors. The 7 million milestone is particularly impressive given the meager 26,000 the website managed to sign up in its first month, NBC News notes. Those who missed yesterday's deadline—and haven't qualified for one of nine extensions and exceptions to the rules—won't get another chance at open enrollment until November.