EL PASO, Texas - Trying to overcome a string of losses and a staff shake-up, Hillary Rodham Clinton sought new energy Tuesday night from a boisterous crowd of about 12,000 in a state she hopes will provide a rebound in her quest for the Democratic presidential nomination. Clinton, whose rallies had been overshadowed by rival Barack Obama's huge crowds, arrived at the packed University of Texas at El Paso basketball arena as voters were giving Obama victories in Maryland, Virginia and Washington, D.C. But her sights were set on the March 4 Texas and Ohio primaries and on President Bush....