"Of the 1,001 American adults polled online April 20-23, only 28% had a positive view of Mr. Bush’s job performance, down from 32% in February and from a high of 88% in the aftermath of the terror attacks of Sept. 11, 2001. The current rating is his weakest showing since his inauguration."
Can he get below 20%? Sure he can. Let's see how long it takes.