Democrats in Colorado are employing a novel strategy as they seek to oust controversial Republican Lauren Boebert from her deep-red congressional seat. "Claudia Cunningham had never voted for a Republican in her life. She swore she couldn’t or her father would roll over in his grave. But ahead of the Colorado primary on Tuesday, she did the once-unthinkable: registered as unaffiliated so that she could vote in the G.O.P. primary against her congresswoman, Lauren Boebert," The New York Times reported Wednesday. "So did Ward Hauenstein, the mayor pro tem of Aspen; Sara Sanderman, a teacher from Glenwood Springs; Christopher Arndt,...