UKIP’s deputy leader has resigned in protest over Henry Bolton’s refusal to step down as head of the party.
Margot Parker told BBC Radio Northampton that Mr Bolton has left the party in “limbo” and that he should go “sooner rather than later”.
She will remain a member of UKIP and an MEP for the East Midlands.
Her resignation comes after the party’s national executive committee (NEC) unanimously backed a vote of no confidence.
Mr Bolton has faced repeated calls to quit over offensive texts sent by his former girlfriend.
Ms Parker, who is also an East Midlands MEP, said Mr Bolton’s “personal life took over the job he was elected to do”.
She added: “It would be quicker and cleaner if he came to the conclusion he could go sooner rather than later.
“This is taking time away from doing the job. This puts the party in a limbo situation.”
Mr Bolton, who became leader of UKIP in September 2017, said he would defy the NEC and continue as leader, as a contest would finish the party.
Party members will now be given a vote on whether the former Army officer should remain in post.
UKIP chairman Paul Oakden said Mr Bolton was “disappointed” by the NEC’s decision but understood “that the party has a process to go through”.
“Henry was offered the opportunity to resign but he has made clear that he feels he is the right man to lead the party forward,” he added, after a three-hour emergency meeting on Sunday to decide his future.
The committee does not have the power to remove him – that can only be done by a vote of the party’s membership.
Mr Bolton had earlier toured TV and radio studios, saying the committee had no right to pass “moral” judgement on his private life.
He said he had ended the “romantic element” of his relationship with girlfriend Jo Marney after she sent texts saying Prince Harry’s fiancee Meghan Markle would “taint” the Royal Family, leading to accusations of racism.
But he said he would “support her in rebuilding her life”, which he said had been “turned on its head”.
If the former army officer were to step down it would leave UKIP seeking its fifth leader in 18 months.
The 53-year-old party leader, who left his wife prior to his relationship with Ms Marney, 25, became public, said: “I don’t believe I have done anything wrong.
“My own personal life, it’s a little bit of a mess at the moment. I need to sort that out, of course.”