The candidate is believed to be Prime Minister Gollum Brown's 3-year-old son Fraser, who announced his presence on social networking site Twitter this afternoon.
Fraser Brown's enigmatic message, which read, "fvdfzsrsazxzzxcvbnmadgfhjjkqwrtyuuuiop" and which was presented without further comment, has provoked a storm of comment and mixed interpretations in the grass-roots Labour movement.
One fanatical Labourite, Ellie Gellard, was breathless in her praise, saying, "this is the Second Coming of Labour. I believe that Fraser's message shows that he is the true reincarnation of Aneurysm Bevan. He is the inspirational leader who will lead us to a glorious Socialist Revolution and re-election for a miraculous Fourth Term!", before being overcome and needing medical treatment.
However, this interpretation of the message was strongly challenged by Will Straw of propaganda site Left Foot Forward, who said, "this message is clearly in support of Gordon Brown, and supports further borrowing and investment instead of Tory cuts. I am moved almost to tears by its profundity".
Business Secretary Lord Fondlebum denied reports that he was negotiating with Sarah Brown for Fraser's leadership candidacy after the next General Election, but did confirm that he will be taking over responsibility for the boy's education with immediate effect.
David Cameron declined to comment on the developments, saying it was 'purely a Labour Party matter. However, The Diary approached Tory blogger and prospective Parliamentary candidate Iain Dale for comment, who said, I don't think we can read too much into a single Tweet. At present, all we can say at this time is that this message from Fraser Brown is clearer than anything his father has ever said".