When Marjorie Taylor Greene was elected to America’s House of Representatives in 2020, she became one of the most visible of a wave of extremists to enter the Republican party whose often bizarre utterings stretched the bounds of what had previously been the norm of US politics. The Georgian congresswoman, who has suggested Jewish space lasers are responsible for wildfires, speculated whether 9/11 was a hoax and supported the QAnon conspiracy theory, was part of a new wave of Trumpian Republicans and was mocked, ridiculed and reviled in equal measure – including by some in her own party. But in...