WASHINGTON — Reps. Elaine Luria and Adam Kinzinger, who will lead questioning in the closing summer hearing of the Jan. 6 committee on Thursday night, are from different parties but agree emphatically on one thing: The investigation into the deadly insurrection at the U.S. Capitol is worth sacrificing their political careers.Luria, a Democrat first elected in 2018, is facing a difficult reelection in a Virginia swing district that was redrawn to be more Republican. Kinzinger, a Republican who’s a pariah to some …