According to this SPIEGEL article (the abridged English version of a German original unfortunately behind the subscription wall), the odds don't look good for Bliar, who has more enemies:

But numerous Social Democrats and most Christian Democrats, along with German Chancellor Angela Merkel, aren't as impressed. On Monday, the Daily Telegraph also reported that senior allies of current Prime Minister Gordon Brown were plotting to wreck Blair's ambitions for the post out of concern that his appointment could reignite old divisions within his Labour Party.

Further candidates discussed are Belgium's Verhofstadt, Poland's Kwaśniewski and Aznar, though they note Aznar has the same problem with the incumbent PM's opposition as Bliar...

_{*Lunatic*, n.
One whose delusions are out of fashion.}