Mitt Romney has accused his rival President Barack Obama of running a campaign built on “anger and divisiveness”.

Republican presidential candidate Mitt Romney said the Democratic campaign had hit a “new low” by trying to link him to controversial views on rape recently voiced by another Republican, Todd Akin.

The Obama camp has accused Mitt Romney of extreme positions on social issues.

The Republicans are due this week to nominate Mitt Romney as their candidate in November’s presidential elections.

Mitt Romney has accused his rival President Barack Obama of running a campaign built on "anger and divisiveness"

The party has been forced to delay by a day – until Tuesday – the start of its national convention in the Florida city of Tampa because of the approaching Tropical Storm Isaac.

“I would suggest that that’s a campaign of anger and divisiveness,” Mitt Romney said, referring to Barack Obama’s campaign in Sunday’s interview with US TV channel Fox News.

“That’s the kind of divisiveness that I think Americans recognize and I think it’s one of the reasons why his campaign, despite spending massively more than our campaign, that his campaign hasn’t gained the traction that he would have expected.”

Mitt Romney said the Democrats were now seeking to tie him to the remarks by embattled congressman Todd Akin, who sparked uproar by claiming women’s bodies could prevent pregnancy in cases of “legitimate rape”.

He described the remarks as “offensive and wrong”, urging the Missouri congressman to withdraw his candidacy for the Senate.

However, he admitted in Sunday’s interview that the controversy over the remarks “hurts our party and I think is damaging to women”.

Many voters do not yet feel they know Mitt Romney, and he will seek to boost his image at the Republican national convention in Tampa.