WASHINGTON — President Obama, facing angry reprisals from parents and from lawmakers of both parties, will drop his proposal to effectively end popular college savings accounts known as 529s, but will keep an expanded tuition tax credit at the center of his college access plan, the White House said Tuesday. The decision came just hours after House Speaker John A. Boehner of Ohio demanded the proposal be withdrawn from the president’s budget, due out Monday, “for the sake of middle-class families.” But the call for the White House to relent also came from top Democrats, including Representatives Nancy Pelosi of...