WASHINGTON (Reuters) - President Barack Obama will announce a new plan next week to help Americans who continue to struggle to find jobs even as the economy recovers from recession, his senior adviser, Dan Pfeiffer, said on Saturday. Obama's efforts to help the long-term unemployed are part of an economic strategy he will lay out in his annual State of the Union address on Tuesday and expound upon during a four-state tour, Pfeiffer said in a mass email from the White House. "With some action on all our parts, we can help more job seekers find work, and more working...