Yang is concerned that the lack of surveys over the holidays will keep him and other candidates off the stage on Jan. 14. Justin Sullivan/Getty Images

The Democratic National Committee rejected a request from 2020 candidate Andrew Yang to conduct additional polls ahead of January's Democratic primary debate in Iowa.

Yang wrote to DNC Chairman Tom Perez earlier this month, arguing that a "diverse set of candidates might be absent from the stage in Des Moines for reasons out of anyone's control," NBC News reported.

The tech entrepreneur, who was one of only seven candidates to make the December debate stage, is concerned that the lack of surveys over the holidays will keep him and other candidates off the stage on Jan. 14, weeks before the Iowa caucuses.

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"It has been 47 days since a qualifying poll in Iowa, New Hampshire, or Nevada was taken. As you know, big shifts can happen within short periods in this race, as we've already witnessed multiple times. Let's ask the people," Yang tweeted.

However, the DNC told The Hill that commissioning its own polls could call into question its impartiality. A spokesperson said the committee has already "been more than inclusive throughout this entire process."

"The DNC will not sponsor its own debate qualifying polls of presidential candidates during a primary," the spokesperson said. "This would break with the long standing practice of both parties using independent polling for debate qualification, and it would be an inappropriate use of DNC resources that should be directed at beating Donald Trump."

The national committee announced earlier this month higher polling and fundraising requirements in order to make it into the January debate. With a deadline of Jan. 10, candidates must reach at least 5% in four national or state polls or 7% in two single-state polls conducted in the early-voting states of Iowa, New Hampshire, Nevada or South Carolina.

Additionally, candidates must receive contributions from at least 225,000 unique donors with a minimum of 1,000 donors from at least 20 states.

So far five candidates have qualified, including former Vice President Joe Biden; South Bend, Indiana, Mayor Pete Buttigieg; Sen. Amy Klobuchar of Minnesota; Sen. Bernie Sanders of Vermont; and Sen. Elizabeth Warren of Massachusetts, according to The Washington Post. Yang has reached the donor threshold but only has one poll qualification.