Republican presidential nominee Donald Trump continues to cut into Democrat Hillary Clinton’s lead, according to a poll released Sunday.

A Morning Consult survey released Sunday found Mrs. Clinton ahead by 42 percent to 40 percent, within the 2 percentage point margin of error, while Mr. Trump has gained ground in each of the last four polls.

In a Morning Consult poll conducted three weeks ago, Mr. Trump trailed by 7 percentage points. The survey released Sunday was conducted Sept. 1-2.

Mr. Trump also improved his standing in the USC Dornsife/Los AngelesTimes daily tracking poll, which found him ahead Sunday by 45 percent to 42.4 percent after overtaking Mrs. Clinton on Aug. 29.

While polling has been volatile in the 2016 presidential race, the RealClearPolitics average shows Mrs. Clinton leading by 3.9 percentage points in national surveys.

The Morning Consult poll found that a significant number of voters are still up for grabs, with 18 percent saying they are undecided or have no opinion with the election just two months away.

The polling margin remains the same when third-party candidates are included, with Mrs. Clinton holding her 2-point lead at 38 percent and Mr. Trump taking 36 percent, while Libertarian Party nominee Gary Johnson captures 9 percent and Green Party nominee Jill Stein logs 4 percent of the vote.

“A week that saw Donald Trump solidly embrace his well-known harsh rhetoric on immigration has done little to change his standing among the public,” said the Morning Consult analysis, referring to his speech Wednesday in Phoenix.

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