In a dramatic turn of events that underscores the evolving challenges faced by U.S. government agencies,

the acting head of the Internal Revenue Service (IRS)

is set to step down following a bitter dispute over

a data-sharing agreement involving taxpayer information and federal immigration authorities.

Commissioner Melanie Krause’s impending resignation,

announced by the Treasury Department on Tuesday,

marks the latest development in a year of significant upheaval at the agency—

a period characterized by sweeping personnel changes, contentious policy decisions,