London, June 3 (PTI): Launcing a furious attack on President George Bush for his policies on Iraq and global warming, former US vice-president has said in both the cases the best evidence was ignored.

"In both cases, there was more than sufficient evidence to convince any reasonable person that the invasion of Iraq was a catastrophic mistake, and the failure to begin sharply reducing Co2 was an even worse mistake," Al Gore said in his new book 'The Assault on Reason'.

The central thesis of his book is that America has been lulled into a stupor, offering Bush the opportunity he richly craved to bypass or seize control of institutions and to govern through an extremist ideology.

"Reason, logic and truth seem to play a sharply diminished role in the way America now makes important decisions," he writes.

Al Gore, who was vice-president for eight years and Congressman for 16 years, seems almost sickened by the business of politics, a report in The Guardian today said. He elucidates that disgust in 'The Assault on Reason'. The book is a furnace blast of rage against the presidency of George Bush.

It's hard to square the 2000 campaign descriptions of Gore as wooden and bloodless with a text that calls the invasion of Iraq "the worst strategic mistake in the history of the United States," and accuses the Bush administration of presiding over a "moral cesspool".

Gore also writes that the president reminds him most strongly of Richard Nixon, that he is "out of touch with reality" and lacking in curiosity.

Gore believes the Bush Presidency is the manifestation of a far deeper problem.