Democratic National Committee (DNC) Chairman Tom Perez Thomas Edward PerezClinton’s top five vice presidential picks Government social programs: Triumph of hope over evidence Labor’s 'wasteful spending and mismanagement” at Workers’ Comp MORE said Sunday that the criteria to qualify for the party's next presidential primary debate "quite frankly, is a very reasonable bar."

"It's going to be up to the voters to decide who this candidate is and I think our process has been the most fair, transparent and inclusive process the history of the Democratic primary," Perez said on ABC's "This Week."

ADVERTISEMENT

"Our field is deep, but we're reaching a point now when voters are differentiating, and that's what it's about, and candidates have to demonstrate progress as we get closer to Iowa and New Hampshire," he added.

Ten candidates will be on stage for Thursday's debate in Houston, Texas, having reached the required 2 percent support in four qualifying polls and 130,000 unique donors. The polling and donor requirements increased from the first two debates, which both had 20 candidates and were split into two nights.

"I think our process has been the most fair, transparent, inclusive process in the history of the Democratic primary," DNC Chairman Tom Perez tells @GStephanopoulos ahead of Thursday's Democratic primary debate https://t.co/25ZqfRjDCp pic.twitter.com/ZhJOojm5bC — This Week (@ThisWeekABC) September 8, 2019

But Perez said on Sunday that the polling threshold "quite frankly, is a very reasonable bar," and that the DNC communicated the criteria to candidates "well in advance."

"As we get to November and December we will continue to raise the bar of participation because that's what we've always done. As we get closer and closer people have to make progress." he said.