Obamacare's main signup engine attracted just 6,200 new customers on its launch day and 51,000 after the first weekAt the same rate, the 6-month open enrollment period would sign up just 2 million Americans, including 14 states and D.C., which have their own insurance exchangesThe Congressional Budget Office says Obamacare needs at least 7 million customers to stay afloat financiallyNumerous Obama administration officials have denied seeing any enrollment figures at allMailOnline's sources are two Health and Human Services workers who have access to the data as it's crunchedTexas congressman says anemic national enrollment numbers are 'roughly the population of...