Clinton supporters worry about close White House race

By Emily Stephenson and Amanda Becker CONCORD, N.C./WINTERVILLE, N.C. (Reuters) - Hillary Clinton's supporters nervously eyed opinion polls showing the Democrat with a tenuous lead over Republican rival Donald Trump on Thursday as the White House candidates raced through vital battleground states in a late search for votes. Clinton was leading Trump by 6 percentage points, a Reuters/Ipsos poll found on Wednesday. ...