ESPN famously dropped Williams's song 'All My Rowdy Friends' as the Monday Night Football theme last October when the singer compared Obama to Adolf Hitler in a television interview.
Williams once again made controversial remarks to a crowd of 8,500 fans at the Iowa State Fair Grandstand on Friday (August 17), according to the Des Moines Register
"We've got a Muslim president who hates farming, hates the military, hates the US and we hate him," Williams is alleged to have said.
The comments were apparently met with applause from a large portion of the crowd.
William's comments came just days after Megadeth singer Dave Mustaine accused Obama of organising the Aurora mass shooting while on stage in Singapore.
Mustaine said: "Back in my country, my president is trying to pass a gun ban, so he's staging all of these murders, like the Fast and Furious thing down at the border in Aurora, Colorado."
The Megadeth star has since stepped back from those comments, claiming that the US simply deserves "to know the truth" about the tragedy.