Apower that only the senate has isa)introducing revenue bills. b)proposing constitutional amendments. c)approving presidential appointments and treaties. d)bringing impeachment charges against a federal official.

“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 was partially repealed in 2013 in order to avert a government shutdown.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.