New Jersey Democratic Congressman Josh Gottheimer, a moderate who ousted a conservative Republican when he flipped his district blue in 2016, is getting primaried from the left, by a progressive who once counted herself among his supporters. 

Arati Kreibich, a Glen Rock councilwoman and neuroscientist, is challenging the incumbent -- and his $7 million war chest -- hoping to capitalize on the same progressive energy that helped New Jersey Democrats flip four of the state’s five GOP congressional districts in the 2018 midterms.

The race in the 5th district contains many of the elements of the debate facing Democrats across the country as voters grapple between centrist and more leftward-leaning forces of the party heading into Super Tuesday’s primary contests.