WASHINGTON (AP) — The House easily approved an election-year plan Wednesday to provide $170 million to help Flint, Michigan, rebuild its lead-poisoned water system, as Congress moved toward addressing a public health catastrophe that became an acrimonious partisan dispute. Federal, state and local officials blamed each other for the causing the contamination, an effort in Congress to approve aid bogged down and Democrats angrily accused Republicans of dragging their feet on the issue. GOP leaders pledged to craft legislation that will provide the money. Because the Flint money was stalled, Senate Democrats voted Tuesday to derail a must-pass bill to avert a government shutdown this weekend.