Reuters conducts its national poll online, so some folks may want to take it with a grain of salt; the pollsters weigh the data to match the U.S. current population data by gender, age, education, and ethnicity. If nothing else, their latest survey worth noting for the sudden turnaround:
As recently as last week, Clinton led Trump by around 13 points in the poll.
In the most recent survey, 41 percent of likely voters supported Clinton, the Democratic front-runner, and 40 percent backed Trump, with 19 percent not decided on either yet, according to the online poll of 1,289 people conducted from Friday to Tuesday. The poll had a credibility interval of about 3 percentage points.