Sen. Van Hollen to challenge Chuck Schumer for Senate Democratic leadership

In depth

Sen. Chris Van Hollen, a Democrat from Maryland, announced he will run for the Senate Democratic leader post against Sen. Chuck Schumer. The challenge marks a revolt within the Democratic Party.

Van Hollen, 67, is among the lawmakers who have pushed to halt arms shipments to Israel. He accused it of committing genocide in the Gaza Strip, and led an initiative to remove provisions that require expanded defense and intelligence cooperation between Washington and Jerusalem.

Van Hollen called for not accepting donations from AIPAC. Bernie Sanders supports changing the leadership, and Schumer stated: "I have the votes."