Peter Oborne argues that the Tories should either have fought a strong by-election campaign or not have run a candidate at all. In the end, they fell beween two stools.
LabourList's Mark Ferguson blogs on a leaked Lib Dem document suggesting that local campaigners should repeat the mantra "it's the Labour Party's fault".
The BBC's Michael Crick notes that the far-right party's vote share declined in Oldham, historically one of its strongest areas.
At ConservativeHome, Paul Goodman argues that cooler, clearer dealings between the two parties would help to calm the government.
Over at Left Foot Forward, Will Straw says there is little evidence of the Lib Dems' "progressive influence" when it comes to the economy.