City Councilmember Chi Ossé of Brooklyn has taken the first official step toward a Democratic primary challenge against House Minority Leader Hakeem Jeffries, the highest-ranking Democrat in the U.S. House of Representatives.

“The Democratic Party’s leadership is not only failing to effectively fight back against Donald Trump, they have also failed to deliver a vision that we can all believe in,” Ossé said in a statement.

Ossé, 27, was elected to his second full term on the City Council in November and recently joined the Democratic Socialists of America. He has used a growing social media presence to engage New Yorkers on how the government works and when it doesn’t.