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Defense Secretary Pete Hegseth leaves Senate Majority Leader John Thune's office in the U.S. Capitol on Aug 4. Photo: Bill Clark/CQ-Roll Call via Getty Images

Top Pentagon officials are already pitching reconciliation 4.0 to Senate Republicans behind closed doors, underscoring the need for a massive boost in military funds, Axios has learned.

Why it matters: Thune hasn't embraced reconciliation 3.0. The White House is already looking beyond it.