National Poll: Clinton's Lead Over Trump Narrows to 3 Points

Hillary Clinton has a narrow lead over Donald Trump in a head-to-head matchup that's tightened in the last three weeks, a new national poll shows.

In the Economist/YouGov online poll released Thursday, the one-on-one breaks down like this:

• Clinton: 47 percent
• Trump: 44 percent

In a match including third party candidates, the support goes like this:

• Clinton: 42 percent
• Trump: 38 percent
• Libertarian candidate Gary Johnson: 6 percent
• Green Party candidate Jill Stein: 4 percent

The survey's margin of error is plus or minus 4.1 percentage points.

According to the pollster, Clinton also had a 3-point advantage over Trump in a survey Aug. 20, but was ahead 47-41 percent in its Aug. 13 poll, and 48-41 percent on Aug. 6.

In other findings:

• 24 percent think Clinton will likely win "in a landslide," while 29 percent predict she'll win at least narrowly.
• 19 percent think Trump will win narrowly, while 9 percent think that he'll win in a landslide election; 19 percent aren't sure.

• South Carolina Poll: Clinton, Trump Neck-and-Neck
• Reuters Poll: Clinton Leads Trump in Key Swing States