Tonight it returns with a debate marking the 10th anniversary of the September 11 attacks.
It was the closest the two candidates came to a human connection in a debate marked by bitter exchanges.
It was a representative moment in a debate marked by both sharp exchanges and sometimes-jarring moments of levity.
The debate marked Bush's strongest showing to date, after tepid performances last year that dogged his flailing presidential campaign.
Adrian Searle will chair a debate marking 10 years of Artangel at the Newsroom vistor and archive centre, 60 Farringdon Road, London EC1, at 7pm on Tuesday.
Tonight's leader's debate marks the point when the July 2 election campaign would have started if it hadn't been three weeks longer than usual.
"The measure of a democratic organisation is how differing views are expressed, the nature of debate marks its character," he said in a statement to the Guardian.
During the American elections of 2012, Al Jazeera staged an opposition presidential debate, marking it out from the big networks which operate a blackout of independent candidates and concentrate exclusively on the Republicans and Democrats.
The opposition candidate in Argentina's presidential race, Mauricio Macri, appears to be gaining fresh momentum towards victory in Sunday's run-off vote to replace outgoing President Cristina Fernandez de Kirchner, following a televised debate marked by ferocious exchanges.
The endorsement by Mr. Christie, which came hours before the Republican candidates gather here for a debate, marked the latest effort by Mr. Romney to galvanize the Republican establishment behind his candidacy.
