What strikes me, though, is how shortsighted much of that pressure is. Some Lib Dem MPs are, apparently, unhappy with the scope of the coalition's spending cuts – but did they not notice how, under Clegg, they had become a party of fiscal restraint and, to some extent, "savage cuts"? And as for more "policy wins," the demand is perhaps to be expected - but why wasn't it raised as vigourously when the coalition agreement was first published? I suppose falling poll ratings do a lot to change a party's attitude.
In any case, Clegg will need to counter his detractors – especially with the Labour leadership contenders, including Ed Balls this morning, doing all they can to leverage the situation against him. This, as we have seen, will mean an emphasis on issues like "social mobility". It will probably also mean a few policy concessions won from the Tories. But it will also require Clegg to surpass himself on set-piece occasions such as his conference speech in September. For once, the Lib Dems' bash may be the most compelling of them all.