The Guardian's John Harris discusses whether Blears's resignation is part of a larger Blairite plot.
Sunder Katwala says that Yvette Cooper could become the first female Chancellor.
Nick Robinson says that Blears has "fired the starting gun on a leadership contest".
Over at Liberal Conspiracy, Sunny Hundal calls for Ed Miliband to stand for the leadership.
Benedict Brogan predicts that Caroline Flint will be the next minister to jump ship.