This stanza refers to the Tory leadership contest following Theresa May’s resignation as UK Prime Minister. At present, Boris Johnson is far ahead of his rivals. The stanza’s warning, that in his career he has been sacked twice for lying, is a matter of public record. So is much else that is disreputable. In a world that made sense, such a record would make him unemployable at any level, for any job, ever. At present, he is clear favourite to become the UK Prime Minister.