Labour heavyweights usually support each other - at least in public. But the former Prime Minister Tony Blair couldn't bring himself to do so when asked on Sky News.

He dodged the question of whether the current Labour leader was the best person to lead the country, instead urging voters not to give Theresa May a "blank cheque". 

If this seems shocking, it's worth remembering that Corbyn refused to say whether he would pick "Trotskyism or Blairism" during the Labour leadership campaign. Corbyn was after all behind the Stop the War Coalition, which opposed Blair's decision to join the invasion of Iraq. 

For some Corbyn supporters, it seems that there couldn't be a greater boon than the thrice-elected PM witholding his endorsement in a critical general election. 

Couldn't be happier Tony Blair won't endorse Jeremy Corbyn. Dont want a war criminal who now works for JP Morgan on our side!

— Ruaraidh Swainson (@RuaraidhSw15) April 27, 2017

If Tony Blair and Boris Johnson don't like Corbyn... That seems like the biggest endorsement they could give him really.

— Richard York (@RichardYork4) April 27, 2017

Tony Blair coming out and refusing to support Corbyn is only good news, not many men more unpopular than him in the UK.

— Vote Labour '17 (@VoteLabour17) April 27, 2017

With all the dislike toward Tony Blair these days, surely not having his support in the election is best case scenario for Corbyn?

— G.D (@itisGD) April 27, 2017