Ten Democratic senators are pressuring the White House to make the Labor Department’s fiduciary rule for financial advisors conform to the Security and Exchange Commission’s upcoming regulation.

“We remain very concerned that uncoordinated efforts undertaken by the agencies could work at cross purposes in a way that could limit investor access to education and increase costs for investors, most notably Main Street investors,” the 10 said in an August 2 letter to the Office of Management and Budget.

The senators praised the SEC for developing a fiduciary rule in accordance with Congress’s mandate, but warned that the Labor Department seems poised to issue a regulation that could conflict with the SEC’s work. They want the SEC to come out with its fiduciary guidelines first.

The Labor Department and the SEC are required by the three-year old Dodd Frank Act to create a uniform fiduciary standard for financial advisors and broker-dealers who give investment advice.

The letter was sent to OMB because the unit serves as the referee when federal agencies draft conflicting regulations, said a spokesperson for U.S. Sen. Jon Tester (D-Mont.), who took the lead in the correspondence.

The other signers are senators Kay Hagan (D-N.C.), Claire McCaskill (D-Mo.), Amy Klobuchar (D-Minn.), Mark Warner (D-Va.), Ben Cardin (D-Md.), Mark Begich (D-Alaska), Tom Carper (D-Del.), Mark Pryor (D-Ark.) and Kirsten Gillibrand (D-N.Y.).

Hagan is the only signer on the Senate committee that oversees the Labor Department.