A new poll by the University of Mary Washington shows a tightening race in Virginia between presidential candidates Hillary Clinton and Donald Trump, according to a news release Thursday.

The survey of 1,006 Virginia adults conducted Sept. 6-12 found that 40 percent of likely voters favored the former Secretary of State compared to 37 percent for the New York businessman.

The 3 percent difference suggests the race got closer since last month when a Washington Post poll showed Clinton, the Democratic nominee, had a 7 percentage advantage over Trump, the Republican nominee, among Virginia voters.

“Mary Washington’s latest survey demonstrates that Virginia remains one of the nation’s most purple states,” said political science professor Stephen J. Farnsworth, director of the university’s center for leadership and media studies that sponsored the poll. “This survey demonstrates that the Trump campaign is wise to focus its resources on Virginia, and that the Clinton campaign is making a mistake by directing its attention elsewhere.”

Libertarian Gary Johnson received the support of 8 percent of likely Virginia voters in the recent poll conducted for the University of Mary Washington by Princeton Survey Research Associates, according to the release.