A combative Rep. Liz Cheney lashed out at leaders of her own Republican Party late Tuesday, taking to the House floor on the eve of her near-certain ouster from a leadership post to warn that former President Donald Trump and his GOP supporters are threatening to “undermine our democracy.” In an abruptly announced evening appearance in a nearly empty House chamber, Cheney, R-Wyo., cast herself as a defender of the Constitution. Her four-minute speech also served notice that she had no intention of backing down in her battle against a former president who has retained loyalty among many GOP lawmakers and voters, even as it leaves her once promising political career in question. “Remaining silent and ignoring the lie emboldens the liar,” she said, adding, “I will not sit back and watch in silence while others lead our party down a path that abandons the rule of law and joins the former president’s crusade to undermine our democracy.” Cheney has for weeks faced calls for her o...