UK Independence Party leader Nigel Farage has hit back at claims that his party is supported by racists and is against foreigners and immigrants.
Government minister Ken Clarke launched a savage attack and branded Ukip "clowns" as the parties prepare to go into the local elections on Thursday. The veteran politician took the swipe after Ukip accused the Conservatives of running a "morally reprehensible" smear campaign against its would-be councillors.
Mr Farage responded, saying: "They have lost the argument so Ken Clarke and others have decided that, rather than going for the ball, they are going to attack the player and that is exactly what this is about."
Mr Farage, whose party is fielding 1,700 candidates in the council elections, told ITV's Daybreak that rival politicians are afraid of Ukip.
He said: "They know that the British public are genuinely concerned about opening up the door to Bulgaria and Romania next year. They are concerned because we have a million youngsters unemployed, we have wages being driven down and I am afraid a crime wave in London being caused by Romanians already.
"These are tough subjects to talk about. All we are doing is talking the truth. There is nothing in Ukip that is racist in any way at all and Ken Clarke knows it. If he throws this abuse out, we will start having a proper debate."
Ukip is investigating a handful of its record 1,700 candidates over links to groups such as the BNP and alleged racist and homophobic comments.
Mr Farage, whose party has said it does not condone "unpalatable views", told the programme Ukip is "the only party in British politics who does not allow former members of the BNP to even join us as a member, let alone be a candidate. Labour has sitting councillors who are former BNP members, the Tories have BNP members in their party, we forbid it."
London Mayor Boris Johnson has urged Tories not to panic over Ukip's rise in the polls, insisting it could be a good thing. Mr Johnson said the party's popularity suggested the Conservative approach was "broadly popular", while Labour was "going nowhere".
Writing in The Daily Telegraph as campaigning intensifies ahead of the elections, Mr Johnson said Mr Farage had always struck him as a "rather engaging geezer", adding: "He's anti-pomposity, he's anti-political correctness, he's anti-loony Brussels regulation. He's in favour of low tax, and sticking up for small business, and sticking up for Britain."