House Appropriations Committee Chairman Dave Obey (D-Wis.) and Rep. Maxine Waters (D-Calif.) engaged in a late-afternoon shouting match on the House floor after Obey reportedly rebuffed Waters on an earmark request, aides and witnesses said. Witnesses, speaking on condition of anonymity, said it appeared that Waters pushed or shoved Obey. ... The two veteran Democrats — each pugnacious and 71 years old — began shouting, with the L.A.-area congresswoman following Obey around the chamber, reportedly suggesting he channel the vocational money through a local school district. At some point, they collided, witnesses say, with one Obey ally claiming the lean...