By Lizzy Buchan Rishi Sunak should “swallow some pride” and call on Boris Johnson to save his struggling party, ex Chancellor Kwasi Kwarteng has said. The top Tory, who was sacked as Chancellor by Liz Truss after their mini Budget crashed economy, said Mr Johnson was an “electoral force” – and warned the Prime Minister that “something has to change” to prevent electoral wipeout. In an interview with GBNews, Mr Kwarteng said: “I’ve always been a big Boris fan. He had a very good success as an electoral force. “You know, we’re 20 points behind, and the polls haven’t really moved in the last year…