Clinton boosted as candidates rally support

Poll and experts suggest she is winner of first presidential debate - a battle of endurance

Donald Trump and Hillary Clinton jumped back onto the campaign trail on Tuesday after a bitter first head-to-head debate in which Clinton frequently forced her prickly opponent on to the back foot.

The White House hopefuls sparred over temperament, stamina, judgment, and other issues in a televised matchup on Monday night that seemed to have gone in favor of the Democrat Clinton.