by the non-partisan Tax Policy Center.
"[T]he McCain plan, which would replace the current exclusion for employer-paid premiums with a refundable income tax credit of up to $5000 for anyone purchasing of health insurance and make other changes to the healthcare system, would increase the deficit by $1.3 trillion over 10 years and modestly trim the number of uninsured. The Obama plan, which would make relatively low-cost insurance available to everyone through non-group pools and subsidize premiums for low- and moderate-income households, would cost $1.6 trillion, but would also cover virtually all children and many currently uninsured adults.
TPC projects the McCain plan would trim the uninsured by 1 million in 2009 and nearly 5 million by 2013, although their numbers would slowly rise thereafter because the tax credit would fail to keep pace with premiums. Obama would reduce the uninsured by 18 million in 2009 and 34 million by 2018. Even under the Obama plan, however, 34 million Americans would still lack insurance in 2018."
http://www.taxpolicycenter.org/publications/url.cfm?ID=411750