From the things he has said in his campaign, he gives the impression that he's going to improve alot for the United States of America such as:
Improve the health service
Close the Guatanamo Bay prison
Proposed to a countrywide road- and bridge-building programme
Nationwide schemes to refurbish public buildings and schools
Pledged to ensure that 10% of America's electricity comes from renewable sources by 2012, and 25% by 2025
All these will cost quite alot of capital to proceed...and if he's going to reduce taxes and insurance costs, I'm not sure where he's going to get the budget from = S