WASHINGTON — Democrats and Republicans have sparred for the past few months over what should be done about staffers’ healthcare: should they go on the healthcare exchanges, as a provision in Obamacare seems to require, or should they stay on the healthcare plan they have now, where they receive an employer subsidy help defray the costs? The deadline for members to make that decision arrived at 5 p.m. on Halloween. Members could either designate staff as “official,” in which case they would be required to go on the exchanges, or “unofficial,” in which case they could remain on the Federal...