"There's no 'job-killing' health-care law. There's only the health-care bill. And my problem with the modifier 'job-killing' isn't that it's uncivil, though perhaps it is. It's that it's untrue."
The GOP lifted the claim from this Congressional Budget Office report (pdf) -- but the report never says the bill will kill jobs. What it says, rather, is that the law will slightly reduce labor. It's not that employers will fire workers. It's that potential workers -- particularly older ones -- will retire somewhat earlier. "The expansion of Medicaid and the availability of subsidies through the exchanges will effectively increase beneficiaries’ financial resources. Those additional resources will encourage some people to work fewer hours or to withdraw from the labor market."