From the Washington Post:

A clash over fundraising tactics between operatives running a network of super PACs poised to back a Hillary Rodham Clinton presidential run led liberal activist David Brock to angrily break ties Monday with one of the biggest groups in the coalition.

Brock — who runs a suite of groups already churning out research to boost Clinton and impale her potential GOP rivals — stepped down from the board of Priorities USA Action after a story in the New York Times raised questions about a donor consultant who works with his organizations.

In a sharply worded letter, Brock accused current and former Priorities officials of fueling a “specious and malicious attack” against American Bridge and Media Matters by providing information for the piece, which he called “an orchestrated political hit job,” according to a copy obtained by The Washington Post. Brock’s departure was first reported by Politico.

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