A subsidiary of the Venezuelan national oil company will ship 12 million gallons of discounted home-heating oil to local charities and 45,000 low-income families in Massachusetts next month under a deal arranged by US Representative William D. Delahunt, a local nonprofit energy corporation, and Venezuela's president, White House critic Hugo Chávez. The approximately $9 million deal will bring nine million gallons of oil to families and three million gallons to institutions that serve the poor, such as homeless shelters, said officials from Citizens Energy Corp., which is signing the contract. Families would pay about $276 for a 200-gallon shipment, a...