Guardian: The catastrophic oil spill in the Gulf of Mexico set off a political backlash against the oil industry today, with a demand for a ban on future offshore drilling. The rising anger at the long-term costs of the 200,000-gallon-a-day gusher of crude oil in the gulf also carried a financial sting. On Capitol Hill, senators, flanked by environmental organisations, rolled out a proposal that would put oil companies on the hook for up to $10bn (£6.5bn) for the cost of a spill. The cap …