Republican National Committee (RNC) Chairman Reince Priebus accused Fox News of only showing the “worst” polls for Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE in a segment on Friday.

When Fox anchor Melissa Francis noted Priebus’s prediction that Trump would catch Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE at the polls by around Labor Day, Priebus pushed back.

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He questioned why the network's graphic used numbers from a head-to-head matchup between Trump (R) and Clinton (D), which showed the GOP nominee down by 6, instead of the four-way race with Green Party nominee Jill Stein and Libertarian nominee Gary Johnson Gary Earl JohnsonWhat the numbers say about Trump's chances at reelection Presidential race tightens in Minnesota as Trump plows resources into state The Hill's Campaign Report: Biden condemns violence, blames Trump for fomenting it l Bitter Mass. primaries reach the end l Super PAC spending set to explode MORE, which was closer.

“Wait a second, the Fox News poll shows he was down by 3 in a four-way race,” Priebus said.

“You want to choose the worst that's available. The Fox News poll showed him down by 3, Reuters showed it even, L.A. Times had him 2 points up.”

Priebus went on to argue that polls have been trending in Trump's favor recently.

“He's either down by a couple, or even. It's exactly where we thought this thing was going,” Priebus said.

“I don't think anyone can deny the polls are narrowing, and I think the momentum is on his side.”

While Clinton opened up a significant lead nationally and in battleground states in the weeks after the parties' presidential nominating conventions, the gap has been closing over the past few days.

Clinton currently sits 4 points ahead of Trump in the RealClearPolitics average of the head-to-head match-up. That lead shrinks to 3 points when all four candidates are included.