Donald Trump continues to slowly close his gap with Hillary Clinton, according to a new poll from NBC News.



Results from the latest NBC News/SurveyMonkey Weekly Election Tracking Poll shows the Democratic nominee leads Trump by just four percentage points – 48 percent to 44 percent – in a head-to-head match up of the two presidential candidates. The new numbers reveal a decline of two percentage points for Clinton since last week.



The race is even tighter when including Libertarian nominee Gary Johnson and Green Party's Jill Stein. In the four-person poll, Clinton is ahead of the Republican nominee by just two percentage points – 42 percent to 40 percent.





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Johnson holds at 11 percent, while Stein maintains 4 percent, according to the online poll that collected data from 16,220 registered voters from September 5 through September 11.



Just a few weeks ago, Clinton, 68, held a double-digit lead over Trump and a similar lead among independents. The polls also showed that Trump, 70, is attracting more independent voters. He now trails the Democratic nominee by just two percentage points – 38 percent to 36 percent – among those who do not identify as either Republican or Democrat.



NBC noted the poll results have a margin of error of about 1.1 percentage points.



Since the poll was collected, Clinton's health issues have been in the spotlight. On Sunday, the former Secretary of State was forced to leave September 11 anniversary services after becoming ill.



She was diagnosed with pneumonia on Friday, her campaign said, after initially blaming her early departure from the memorial service and a stumble caught on video as she entered her SUV on becoming overheated.