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Global Tax Deal Faces Threat in Senate Treaty Challenge (1)

Oct. 12, 2021, 5:48 PM

As the Biden administration and governments around the world celebrate another advance toward an historic global tax accord, an obscure legal question in the U.S. threatens to tear it apart.

At a congressional committee hearing last month, Republican Senator Pat Toomey, who opposes the agreement, told Treasury Secretary Janet Yellen that a key portion of the tax deal would require a formal treaty approved by a super-majority in the Senate.

While Republicans have assailed the agreement generally, Toomey’s claim marked the opening salvo in what could be a crucial legal debate over what exactly is required of Congress to ...