Public opinion is sharply reflecting three weeks of un-staunched oil spill in the Gulf of Mexico. Less than half of Americans now support offshore oil drilling—a huge drop from the days of "drill, baby, drill"—according to a new CBS poll.

Polling indicates a swing from 64 percent favorable to offshore drilling to only 46 percent now. Forty-one percent of those polled say the costs and risks of drilling are too great. Previously, only 28 percent held that position.