WASHINGTON — Democrats in the House Wednesday muscled through a year-end plan to create jobs, mixing about $50 billion for public works projects with another almost $50 billion for cash-strapped state and local governments. The unemployed would get continued benefits. But conspicuously absent from the plan were President Barack Obama's recently announced proposals to give Social Security recipients $250 payments, a tax credit for small businesses that create jobs and a program awarding tax credits to people who make their homes more energy efficient. Not a single Republican voted for the plan, which passed on a 217-212 vote after House Speaker Nancy Pelosi, D-Calif., worked the floor for an hour.