On Tuesday evening, Sen. Lamar Alexander (R-Tenn.), the chairman of the Senate Health, Education, Labor, and Pensions (HELP) Committee, said that he was ending bipartisan negotiations for a bill to stabilize health insurance markets and make a few changes to the Affordable Care Act, because after four hearings and involved negotiations, his group had "not found the necessary consensus among Republicans and Democrats." The unexpected decision appears aimed at shoring up support for the Senate GOP's last-ditch plan to repeal ObamaCare, sponsored by Sens.