>American consumers are running out of tricks.
As the weak economy has trudged on, they have leaned on credit cards to pay for holiday gifts, many bought at discounts. They are dipping into savings to cover spikes in gas, food and rent. They are substituting domestic vacations for international trips, squeezing more life out of their washing machines and refrigerators and switching to alternatives as meat prices have risen.
That leaves little room for a big increase in spending in 2012, economists say, a shaky foundation for the most important pillar of the American economy.