ACA is the Affordable Care Act, more colloquially known as Obamacare.
Offtopic perhaps, but somewhat hilariously, ad-hoc polls indicate that if they are presented as separate things, people vastly "prefer" the ACA to Obamacare, despite them being the same thing.
Offtopic perhaps, but somewhat hilariously, ad-hoc polls indicate that if they are presented as separate things, people vastly "prefer" the ACA to Obamacare, despite them being the same thing.