Generally speaking, presidents are judged by how well the economy is doing, especially how voters themselves are doing. They tend to generalize from their own situation and pronounce presidents worthy of reelection on that basis, unless some some overriding international crisis (like the Iranian hostage mess) or a hated war takes precedence. Never mind the passage of health care, financial reform, and the like. How I am doing in terms of my own economic welfare is the chief determinant of voting habits.
So forget all that ephemeral day to day stuff the TV and newspaper pundits suffocate us with. Look at the employment numbers, wages, and income for the masses. It's stupid not to recognize that it is, has been, and likely will be the economy as it plays itself out in the body of citizens who express their own level of economic satisfaction in the voting booth.