House Appropriations Committee Chairman David Obey (D-Wisc.) and Rep. Maxine Waters (D-Calif.) engaged in a late afternoon shouting match on the House floor after Obey reportedly rebuffed Waters on a $1 million earmark request, aides and witnesses said. Witnesses, speaking on condition of anonymity, said it appeared that Waters pushed or shoved Obey. The pair were seen shouting at each other and had to be separated by members -- who were gathered on the floor casting final votes before heading off to a party at the White House. Waters, according a Democratic staffer familiar with the situation, approached Obey to...