The Democratic National Committee is cracking down on gun control advocate and DNC vice chair David Hogg’s plans to spend millions primarying incumbents he deems “ineffective.”

Hogg has most recently drawn attention for his campaign to help younger progressive candidates oust veteran party stalwarts

On Wednesday evening, David Hogg — a vice chair of the Democratic National Committee and a prominent anti-gun violence activist — emphasized that the Democratic Party must grow stronger to push back against the Trump administration, at a lecture event hosted by Brown Democrats in the Salomon Center.