The gas primarily responsible for the greenhouse effect, carbon dioxide, is released by

The Supreme Court upheld the Affordable Care Act, but held that states could opt out of extending __________ coverage

Fill in the blanks with correct word

When the Senate votes to invoke cloture, it

A) limits the amount of time that may be spent debating a bill. B) means a bill must either pass or fail without any amendments. C) sends a bill back to its originating committee for amendment. D) forwards a bill to a conference committee so that differences between the House and Senate versions may be worked out. E) will result in a bill's failure.