Washington: Former president George W Bush took the popular ALS Ice Bucket Challenge in support of Lou Gehrig's disease research today, and challenged his Democratic predecessor Bill Clinton to do the same.

"To you all that challenged me, I do not think it's presidential for me to be splashed with ice water," Bush said while sitting on a sunny porch dressed in a t-shirt. "So I'm simply gonna write you a check," he added in a video posted on YouTube.