by Janet Hook
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When Rep. Paul Ryan and Vice President Joe Biden debate Thursday night as their parties' vice presidential nominees, there will likely be more fireworks than when their running mates met on stage last week, advisers predict.
Mr. Biden has suggested he is eager to draw bright contrasts between himself and his Republican counterpart, in the aftermath of President Barack Obama's lackluster performance in his debate with GOP nominee Mitt Romney.
"I'm looking forward to it, I really am,'' Mr. Biden said in Iowa after the first presidential debate, when Mr. Obama passed up many opportunities to challenge Mr. Romney.