The market got some helpful jawboning from political leaders over the deadlock on taxes and federal spending as the major averages staged a timely upside reversal. Leading stocks behaved well. But a few recent breakouts are testing investors' nerves. The Nasdaq battled its way from an early 1.1% drop to end 0.8% higher. This was an impressive gain, especially considering that Apple (AAPL) did not participate. The Nasdaq's largest component slipped