The Delaware Senate primary could be the biggest get for progressives this primary season

From Alexandria Ocasio-Cortez in New York to Andrew Gillum in Florida, it’s been a primary season marked by progressive upsets — and Thursday’s Senate primary in Delaware could bring one more.

The openly LGBTQ Harris, like Ocasio-Cortez and Boston City Councilor Ayanna Pressley, who took down Rep. Mike Capuano (D-MA) in Massachusetts this week, is another younger woman of color aiming to topple an older white incumbent. She, too, has presented a full-throated progr...