House lawmakers approved a Democratic amendment to a defense bill Wednesday that calls climate change a “direct threat to the national security” of the U.S. and orders up a Pentagon study, but only after some fiery opposition from Republicans.

Rep. Liz Cheney, R-Wyo., the daughter of former Vice President Dick Cheney, said she strongly opposed adding the measure to the National Defense Authorization Act during the House Armed Services markup session. The amendment was offered by Rep. Jim Langevin, D-R.I.

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