Sen. Amy Klobuchar (D-MN) said that she voted, for the first time, for resolutions blocking U.S. arms sales to Israel this week to send a message to the Israeli government of disapproval for the humanitarian situation in Gaza, even as she acknowledged that the vote might not make much of an impact.

“I just think it’s really important for people to speak out when they can, even if it’s on a vote that isn’t probably going to make all the difference right now. And it doesn’t mean I’m going to be hard-stop against aid for Israel in the future,” Klobuchar told Punchbowl News.

“At some point, you’ve got to seek change. And I think this is one way you can do it,” she continued. “I have supported Israel’s right to defend itself, I always will. But they aren’t changing.”

She said that she’d tried to communicate her disapproval of the humanitarian situation in Gaza to Israeli Prime Minister Benjamin Netanyahu during his recent visit to Washington, D.C. but said it “didn’t work very well when I said it.”

Klobuchar said in a Senate floor speech several days before the votes that she attended the meeting with Netanyahu “for one reason: in my capacity as No. 3 in the Democratic leadership, and that was to raise the issue of the humanitarian crisis in Gaza.”

 “I say to my colleagues you can support the people of Israel. You can be horrified and condemn, as all of us did, the terrorist attack. But we cannot continue to allow people to starve,” Klobuchar said. “Lives are being lost on a daily basis, kids, innocents, and the government of Israel must change course.”

She said that U.S. policy must focus on returning to a ceasefire, increasing humanitarian aid, freeing the hostages and security a two-state solution.

The Minnesota Democrat, a moderate, has historically been a quiet but reliable supporter of Israel. She’s also the No. 3 Senate Democrat, seen as a potential successor to Minority Leader Chuck Schumer (D-NY).

Of the 11 members of Democratic leadership, seven voted for the resolutions on Wednesday.

Klobuchar is running for the No. 2 Senate Democratic leadership slot, competing against Sen. Brian Schatz (D-HI), a consistent supporter of prior efforts to halt weapons sales, and Sen. Patty Murray (D-WA), who, like Klobuchar, flipped her vote to support the Sanders resolutions after previously opposing them.