Donald TrumpDonald TrumpEx-DOJ official Rosenstein says he was not aware of subpoena targeting Democrats: report Ex-Biden adviser says Birx told him she hoped election turned out 'a certain way' Cheney rips Arizona election audit: 'It is an effort to subvert democracy' MORE has jumped ahead of Hillary ClintonHillary Diane Rodham ClintonTrump asks Biden to give Putin his 'warmest regards' Huma Abedin announces book deal Mystery surrounds Justice's pledge on journalist records MORE nationally in the race for the White House, according to a new poll.

Trump, the Republican presidential nominee, has 40 percent support to Clinton's 39 percent, according to a poll by the right-leaning Rasmussen Reports released Thursday.

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Libertarian nominee Gary JohnsonGary Earl JohnsonNew Mexico lawmakers send recreational marijuana bills to governor Judge throws out murder convictions, releases men jailed for 24 years On The Trail: Making sense of Super Poll Sunday MORE got 7 percent, and Green Party nominee Jill Steins got 3 percent.

Last week's edition of the same poll showed Clinton, the Democratic nominee, ahead by 4 points, 42 percent to 38 percent.

Clinton's support is down 5 points from a high of 44 percent in the Rasmussen poll taken in early August, shortly after the Democratic National Convention.

Clinton has led in nearly all recent polls. But the race has tightened in recent days, according to the RealClearPolitics average of polls. Clinton still leads Trump by 4.6 points nationally, according to that average. 

Rasmussen Reports conducted its poll of 1,000 likely voters via online and telephone interviews from Aug. 29 to Aug. 30. It has a margin of error of 3 percentage points.