Political rivals Zia Yusuf and Robert Jenrick entered into a brutal war of words on social media.
Former Reform UK chairman Yusuf and the shadow justice secretary accused each other of being a “clown” and “useless”.
Jenrick insisted he had “fought tooth and nail” to cut migration when the Conservatives were in power.
He responded to his rival: “Did the last government do enough? No. That’s why I resigned.
“But enough about me. Why do your own colleagues call you Zia Useless?”
Yusuf lashed out: “Robert, everyone in Westminster hears what you have been saying to the wet Tory MPs, how you are only “pivoting right to hurt Reform” and then will go back to the centre, where you came from.
“This true? Is that what you were telling Cameron at Osborne at that cosy dinner recently?”
Jenrick is seen by many as a potential replacement for Tory leader Kemi Badenoch.
A close ally of ex-prime minister David Cameron’s told the he Spectator magazine he “now thinks Jenrick should take over when the time comes”.
It comes as a new poll suggest Reform would win a majority of seats in the House of Commons if a general election was held now.
Nigel Farage’s party would win 377 seats making him PM, with Labour and Conservatives experiencing a dramatic drop in support.
But Yusuf claimed in response to Jenrick on X, formerly Twitter: “Literally all your colleagues fume that you will say anything to get attention, believe in nothing, and will trample their briefs in the name of getting ahead.
“You’ve spent the last year rearranging deckchairs, being a Farage impersonator and frantically searching for the keys to the presidential suite on the Titanic.”
