A British National Party candidate has said Asian and black people born in the UK could not call themselves British.
Simon Smith, BNP candidate in Warley, West Mids, said on radio: "A dog born in a stable doesn't make it a horse."
Labour candidate John Spellar described the remark as "typically despicable." Tory hopeful Karen Bissell said she treated it with contempt.
Lib Dem contender Tony Ferguson said it proved the BNP was a racist party which he was sure local voters would reject.
A spokesman for the Commission for Racial Equality said they had a strict policy of not commenting on remarks made by candidates during the pending period in a general election.
Mr Smith, who was suspended last year from his job as a maths teacher at a Solihull Roman Catholic School when he stood as a BNP candidate in the European elections, made his comment during a live interview on BBC Radio WM.
He told presenter Adrian Goldberg that black and Asian people and those from other ethnic groups born in the UK could not be called British.
He said there was a long-term social cost in integration and that multi-cultural societies never worked.
Asked to give his party's views on other matters, he concentrated solely on immigration, saying it was their core issue.
Two other candidates are standing in the Warley constituency - Socialist Labour Party: Malcolm Connigale; UK Independence Party: David Matthews.