House speaker John Boehner is set to sign an offer from Obama to accelerate negotiations. Republicans in the House of Representatives have capitulated in the showdown over the payroll tax, handing Barack Obama an important victory going into election year. Under pressure from other senior Republicans for blocking a bill that would extend tax cuts to millions of Americans, the House speaker, John Boehner, is backing away from his insistence that any deal must cover a full year. A deal agreed by Republicans and Democrats in the Senate on Saturday covers two months, to allow further negotiations in January. It...