“I’m four down in one poll, three and a half in another that just came out, and I haven’t started yet,” the presumptive GOP presidential nominee said to The New York Times.
Likely general election rival Hillary Clinton, the presumptive Democratic nominee, has bested Trump in every national poll throughout June, topping him by 3 to 12 percentage points, depending on the survey.
A Reuters poll released Thursday gave Clinton a 9-point advantage over Trump.
In a RealClearPolitics average of polls, Clinton leads Trump by 5.8 percentage points.
Trump also dismissed concerns from some Republicans that his sitting at the top of the ballot will hurt their election bids in November.