Top Treasury tax official exits over audit rules.
US will impose new tariffs on Brazil.
Another reconciliation push.
House GOP leaders push new budget plan.
Republicans press CBO on reconciliation offsets.
TPC examines tariff refund credits.
Key OBBBA provisions still await IRS guidance.
TIGTA flags gaps in IRS cloud contract oversight.
Spending talks stall in the Senate.
Supreme Court rejects broader tax foreclosure claim.
