One research study found that when a recovered heroin abuser returned to the neighborhood where he had previously used heroin, he experienced nausea and other withdrawal effects. This research supports the idea that may be a significant factor in the development and maintenance of substance addiction.

“obamacare”: included a provision for government-run health insurance called “the public option.” was bitterly opposed by congressional republicans because most favored a “single-payer” plan. survived two challenges to its constitutionality. was partially repealed in 2013 in order to avert a government shutdown. led to the expansion of medicaid in republican controlled states.