How Joe Manchin Left a Global Tax Deal in Limbo

WASHINGTON — In June, months after reluctantly signing on to a global tax agreement brokered by the United States, Ireland’s finance minister met privately with Treasury Secretary Janet L. Yellen, seeking reassurances that the Biden administration would hold up its end of the deal.

Ms. Yellen assured the minister, Paschal Donohoe, that the administration would be able to secure enough votes in Congress to ensure that the United States was in compliance with the pact, which was aimed at cracking down on companies evading taxes by shifting jobs and profits around the world.

It turns out that Ms. Yellen was overly optimistic. Late last week, Senator Joe Manchin III, Democrat of West Virginia, effectively scuttled the Biden administration’s tax agenda in Congress — at least for now — by saying he could not immediately support a climate, energy and tax package he had spent months negotiating with the Democratic leadership.