While US tries to inject purpose into meeting, Italy is lambasted for poor planning and reneging on overseas aid commitments

Preparations for Wednesday's G8 summit in the Italian mountain town of L'Aquila have been so chaotic there is growing pressure from other member states to have Italy expelled from the group, according to senior western officials.

In the last few weeks before the summit, and in the absence of any substantive initiatives on the agenda, the US has taken control. Washington has organised "sherpa calls" (conference calls among senior officials) in a last-ditch bid to inject purpose into the meeting.

"For another country to organise the sherpa calls is just unprecedented. It's a nuclear option," said one senior G8 member state official. "The Italians have been just awful. There have …