While on one hand the Heian period was an unusually long period of peace, it can also be argued that the period weakened Japan economically and led to poverty for all but a tiny few of its inhabitants. The control of rice fields provided a key source of income for families such as the Fujiwara and were a fundamental base for their power. The aristocratic beneficiaries of Heian culture, the Ryomin ( "Good People") numbered about five thousand in a land of perhaps five million. One reason the samurai were able to take power was that the ruling nobility proved incompetent at managing Japan and its provinces. By the year 1000 the government no longer knew how to issue currency and money was gradually disappearing. Instead of a fully realised system of money circulation, rice was the primary unit of exchange. The lack of a solid medium of economic exchange is implicitly illustrated in novels of the time. For instance, messengers were rewarded with useful objects, e.g., an old silk kimono, rather than paid a fee.
What crop was a primary source of income during the Heian period?
rice

During the 18th and 19th centuries, federal law traditionally focused on areas where there was an express grant of power to the federal government in the federal Constitution, like the military, money, foreign relations (especially international treaties), tariffs, intellectual property (specifically patents and copyrights), and mail. Since the start of the 20th century, broad interpretations of the Commerce and Spending Clauses of the Constitution have enabled federal law to expand into areas like aviation, telecommunications, railroads, pharmaceuticals, antitrust, and trademarks. In some areas, like aviation and railroads, the federal government has developed a comprehensive scheme that preempts virtually all state law, while in others, like family law, a relatively small number of federal statutes (generally covering interstate and international situations) interacts with a much larger body of state law. In areas like antitrust, trademark, and employment law, there are powerful laws at both the federal and state levels that coexist with each other. In a handful of areas like insurance, Congress has enacted laws expressly refusing to regulate them as long as the states have laws regulating them (see, e.g., the McCarran-Ferguson Act).
In areas of law such as insurance, there are laws refusing to regulate them as long as states have laws doing what?
regulating them

Kerry established a separate political action committee, Keeping America's Promise, which declared as its mandate "A Democratic Congress will restore accountability to Washington and help change a disastrous course in Iraq", and raised money and channeled contributions to Democratic candidates in state and federal races. Through Keeping America's Promise in 2005, Kerry raised over $5.5 million for other Democrats up and down the ballot. Through his campaign account and his political action committee, the Kerry campaign operation generated more than $10 million for various party committees and 179 candidates for the U.S. House, Senate, state and local offices in 42 states focusing on the midterm elections during the 2006 election cycle. "Cumulatively, John Kerry has done as much if not more than any other individual senator", Hassan Nemazee, the national finance chairman of the DSCC said.
Which election did Kerry's PAC focus on?
the midterm elections during the 2006 election cycle