Liberal firebrand Sen. Elizabeth Warren is warning Hillary Clinton not to fill her White House and administration with Wall Street bigs.

“I know that personnel is policy, but let me be clear — when we talk about personnel, we don’t mean advisers who just pay lip service to Hillary’s bold agenda, coupled with a sigh, a knowing glance, and a twiddling of thumbs until it’s time for the next swing through the revolving door, serving government, then going back to the very same industries they regulate,” Warren (D-Mass.) said in a Wednesday speech at the Center for American Progress, according to the International Business Times.

“We don’t mean Citigroup or Morgan Stanley or BlackRock getting to choose who runs the economy in this country so they can capture our government,” she added.

Clinton has ties to all three financial institutions, IBTimes reports. Employees of Citigroup have given $176,311 to Clinton this election cycle, a BlackRock executive held a big fundraiser for the candidate, and Morgan Stanley vice chairman Tom Nides worked in the Clinton State Department and has been rumored to be in the running for a high-profile job in a Clinton White House.

Warren endorsed Clinton in June, saying, “I am ready to get in this fight and work my heart out for Hillary Clinton to become the next president of the United States — and to make sure that Donald Trump never gets anyplace close to the White House.”

But her remarks Wednesday also suggest she’s ready to make sure Clinton’s White House is in line with her values, should the Democrat win the November election.