The two Democratic candidates running for an open Iowa seat in the Senate sparred over the future of Senate Minority Leader Chuck Schumer (D-NY) and his connections to “dark money” organizations during Tuesday night’s debate.

Schumer came up during the debate when Iowa state Sen. Zach Wahls asked his primary opponent, Iowa state Rep. Josh Turek, if he would vote for Schumer as Senate Democratic leader should Turek be elected in November. Turek declined to say whether he would back Schumer, stressing he’s “not a D.C. insider” and doesn’t “know these folks.”