For now Obama is winning the battle of Bain

From the start of his effort to become president the key plank of Mitt Romney’s proposition was that his business career made him uniquely qualified to deal with the massive challenge of the US economy.

For a long period this was backed up by the polling. Now that’s starting to change – particularly in the key swing states where the Obama campaign about Mitt at Bain is being targeted.

On top of this the issue of Mitt making public more of his tax returns is taking centre stage as well the argument over when he actually left Bain – the venture capital group.

There’s a good piece by here by Joshua Green on Mitt’s limp responses to the campaign and associated issues.

For details of where the polling is going check out my latest post for Telegraph blogs.

Romney’s price on Betfair is edging out.

Mike Smithson @MSmithsonPB