MINNESOTA - MR Barack Obama has taken in a record of US$10 million in campaign cash since Republican vice presidential pick Sarah Palin's scorching assault on the Democratic White House nominee.

'Palin's attacks have resulted in our campaign raising over 10 million dollars - a one day record - I hope she gives a speech every day,' said Obama spokesman Bill Burton.

The Alaska governor has electrified the conservative Republican base vote since she was named to the ticket by White House nominee John McCain.

But the avalanche of cash into Obama's campaign suggests that her withering assaults may have also energised Democratic voters as well, raising doubts about her ability to bring crucial swing voters McCain's way.

Earlier on Thursday, Mrs Palin sent out a fundraising email accusing Democrats of orchestrating attacks on her after a week which has seen fierce scrutiny of her past record and the revelation that her unwed teenage daughter is pregnant.

'Unfortunately, as you've seen this week, the Obama/Biden Democrats have been vicious in their attacks directed toward us,' Mrs Palin wrote. 'The misinformation and flatout lies must be corrected.'

Democrats however challenged the Republicans to name an occasion when either the presidential nominee or his vice presidential pick Joseph Biden had ever attacked her family, after speaking out against such attacks.

'The only flatout lie is this ridiculous claim, and it proves that John McCain has wasted no time in teaching Sarah Palin the ways of the Washington he's inhabited for the last 26 years,' said Obama spokesman Bill Burton.

'The continued dishonesty and divisiveness from John McCain's campaign has made a complete mockery of the reform and bipartisanship he'll boast about tonight,' Mr Burton said, ahead of the Republican nominee's primetime acceptance speech. -- AFP