Local news anchor Kari Lake refused to announce that Joe Biden had won Arizona on election night two years ago. Now, she’s the telegenic new face of Maga Republicanism, poised to possibly become the state’s next governor. With early voting underway, polls show Lake in a dead heat with her opponent Katie Hobbs, Arizona’s Democratic secretary of state. The contest will test the strength of Donald Trump’s enduring influence on the Republican party and its supporters. And the entire enterprise of free elections in Arizona hangs in the balance. If Lake wins, her administration will oversee the 2024 elections in...