A few short weeks after he looked set to challenge the two-party system that has shackled Australian politics for over a century, Nick Xenophon's campaign for next Saturday's South Australian election now appears to be experiencing a reverse bandwagon effect.

Media observers have noticed a certain listlessness afflicting the normally exuberant Xenophon, as questions mount as to whether SA Best’s scattered grab-bag of policies and retinue of little-known candidates can handle the scrutiny of a real-world election campaign.