Associated Press: The Gulf of Mexico oil spill hasn’t stained President Barack Obama nor dimmed the public’s desire for offshore energy drilling, according to a new Associated Press-GfK Poll. While some conservative pundits, such as Rush Limbaugh, have called this "Obama’s Katrina," that’s not how the public feels, the poll found. BP PLC, which owned the well that has gushed more than 4 million gallons since an Apr. 20 oil rig explosion, is getting more of the public’s ire. More people surveyed …