The Republican chairs of the House and Senate Armed Services committees issued a joint statement on Wednesday criticizing the idea of the U.S. drastically changing its military combatant command structure, saying they “will not accept” those changes without coordination with Congress and other agencies.

The statement marks one of the first major instances of Republican lawmakers pushing back on President Trump in his second term.

House Armed Services Committee Chair Mike Rogers (R-Ala.) and Senate Armed Services Committee Chair Roger Wicker (R-Miss.)

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