washington democratic presidential nominee hillary clinton hold four percentage point lead republican donald trump abc news/washington post poll release monday one day u.s. presidential election survey 1,763 likely u.s. voters 47 percent say back clinton 43 percent say support trump poll margin error plus minus 2.5 percentage point accord washington post separate bloomberg politics-selzer co poll release early monday show clinton point lead clinton lead trump 47-43 percent white house race washington post/abc poll