New York

Of all the Democratic presidential candidates, Rep. Tulsi Gabbard may most defy easy categorization. She fuses appeals to national honor—drawn from her Army service in Iraq—with resolutely left-wing policy prescriptions, especially on foreign affairs. Yet she appears frequently on Fox News, has earned plaudits from Republican colleagues, and staunchly opposes impeachment proceedings against President Trump, which she warns would “tear the country apart.”

“The...