UKIP leader Nigel Farage has said he will not be standing in the Newark by-election because he does not want to "distract" from the party's European election campaign.
He told the BBC: "I don't want to do anything that deflects from the European election campaign, so I am not going to stand in this by-election.
"I want to focus the next three weeks on winning the European elections."
Mr Farage added he was predicting UKIP would cause an "earthquake in British politics".
Nigel Farage believes efforts to discredit him and his party are failing - and the polls suggest he may well be right.
Almost one third of Britons think that Ukip is a racist party, according to a new ITV News/ComRes poll.