Democratic strategist James Carville and Democratic National Committee vice chair David Hogg sparred over the best strategy to help the party win elections in a heated debate on Wednesday. Tensions between the two began weeks earlier when Hogg announced plans to spend $20 million through his political organization Leaders We Deserve to primary-challenge older Democrats in blue districts.

David Hogg, a top Democratic party official, isn’t backing off his controversial plan to fund primary challenges against Democratic members of Congress he deems “ineffective” in reaching disaffected voters,

The Democratic Party’s internal divisions burst into public view this week after a fiery clash between Democratic strategist James Carville and Democratic National Committee vice chair David Hogg, a confrontation that laid bare frustrations over Hogg’s campaign to unseat fellow Democrats.