Even if this article is to be believed (Guardian, after all), the FACT is that the data source told the lies and the governments acted in good faith on information they believed to be true.
In short .... BUSH DID NOT LIE, Iraq did.
“Trump, as he has done multiple times throughout this presidential race, invoked the Iraq War as a way to criticize Jeb Bush for his brother’s actions. “The World Trade Center came down during your brother’s reign, remember that,†Trump told Jeb, eliciting boos from the audience. Then regarding former president Bush starting the unpopular Iraq war, he said, “They lied. They said there were weapons of mass destruction and there were none. And they knew there were none.†- Donald Trump
The Washington Post reports that in a 2008 interview with CNN’s Wolf Blitzer, Trump said that Nancy Pelosi, who was Speaker of the House at the time, should have pushed for Bush’s impeachment because of his management of the Iraq war. When asked why, Trump replied, for “[getting] us into the war with lies,†a sentiment he repeated on Saturday night. However, the next morning during an appearance on ABC’s This Week, he said, “I don’t even think about it.†- Donald Trump
Though he previously depicted Bush’s actions as deliberate, on Sunday morning he distanced himself from those statements. On NBC’s Meet the Press, Trump backed away from his past impeachment calls, saying, “It may not have been impeachable because it was a mistake.†- Donald “Tell it like it is” Trump
Jaundiced reading of the story ... It is plainly stated that both the Bush and Blair Administrations massaged and exaggerated the “intelligence,” that they ignored protocol in not thoroughly vetting and cross checking ... In more honest circles of discussion this is otherwise known as “lying.”