Not exactly a credible source:

BUSH 'TOOK COCAINE AT CAMP DAVID' Sep 6 2004

And wife Laura liked dope, says book

By Emma Pryer

GEORGE W Bush snorted cocaine at Camp David, a new book claims.

His wife Laura also allegedly tried cannabis in her youth.

Author Kitty Kelley says in her biography The Family: The Real Story of the Bush Dynasty, that the US President first used coke at university in the mid-1960s.

She quotes his former sister-in-law Sharon Bush who claims: "Bush did coke at Camp David when his father was President, and not just once either."

Other acquaintances allege that as a 26-year-old National Guard, Bush "liked to sneak out back for a joint or into the bathroom for a line of cocaine".

More...