Reuters
Politics
 - IRS official refuses to answer questions at scandal hearing
 - Liberal Democrat wins Los Angeles mayor's race
 - Amid rancor, a chance for U.S. action on trade bill
 - Disgraced ex-congressman Weiner announces candidacy for NYC mayor
 - Voters oust mayor of Harrisburg, Pennsylvania in primary
 - Kerry hails tentative Raytheon arms sale to Oman
 - Senate panel passes immigration bill; Obama praises move
 - House panel approves spending cuts, assumes more to come
 - Tax official at center of scandal won't testify: lawyer
 - Senate panel backs arming Syria rebels
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