I don't know. He was re-elected with a majority of 66 in 2005, two years after Iraq started, and then in 2007 the Labour party membership forced him out in favour of Brown, who promptly lost the 2010 election to the Tories.
I'll take Blair Mk II in office over Corbyn in opposition any day.
Brown was extremely popular among members of the Labour party, and never had a snowball's chance in hell in a general election.
Bit of a pattern there.
Eventually you have to grow up and accept that the perfect is the enemy of the good.