"By Dan Balz and Jon Cohen
Washington Post Staff Writers
Monday, January 14, 2008; Page A01

The first contests of the 2008 presidential campaign have led to a dramatic shake-up in public opinion nationally, with Sen. John McCain now leading the Republican field and Sen. Barack Obama all but erasing Sen. Hillary Rodham Clinton's once-overwhelming advantage among Democrats, according to a new Washington Post-ABC News poll. ..."