Rep. Trey Gowdy, the chairman of the House Select Committee on Benghazi, is accusing the Obama administration of delaying lawmakers' investigation by slow-walking the release of crucial documents. 

Meantime, the top Democrat on the committee says former Secretary of State Hillary Clinton is willing to testify at any time and accuses Gowdy of deliberately dragging out the process. reported:

As Gowdy pointed fingers at the administration for trying to hold up the investigation, Rep. Elijah Cummings, D-Md., said the panel was moving at a “glacial” pace and that Democrats “have grave concerns about the partisan path” the committee has taken.

Cummings claimed Gowdy is employing different standards for Republicans and Democrats and has held secret meetings with at least five witnesses.

The comments came as the committee held its third public hearing since its creation last May amid promises of bipartisanship and cooperation. Eight months later, the panel has devolved into finger pointing and accusations of political grandstanding and power plays.

In a letter last week, Cummings said Democrats were concerned about private meetings Gowdy held with witnesses, adding that it appears Gowdy has "withheld or downplayed information [from the witnesses] when it undermines the allegations we are investigating."

Gowdy said in response late Monday that he has the authority to unilaterally subpoena witnesses, but he promised to give Democrats a week's notice before issuing such a subpoena.

"Bipartisanship is a two-way street," Gowdy said in a letter to Cummings. "I have known you to be a fair partner and expect for that cooperation to continue."

Gowdy (R-SC) explained on "America's Newsroom" this morning that he cannot call Clinton before the committee until he knows he has all of the documents. 

Gowdy applauded the recent release of 15,000 documents to the committee, but questioned how many more are being withheld.

"I know they have not given us all of the documents. There are several categories where they have not fully complied," said Gowdy, adding that he is still waiting for Clinton's emails to be handed over.

"I would be a lousy lawyer if I tried to examine any witness before I had all the documents I needed to have a constructive conversation," he said.

He said the committee will also be looking to speak to Susan Rice and Clinton's then-chief of staff Cheryl Mills.

Martha MacCallum asked Gowdy about accusations that the investigation is being used by Republicans to hinder Clinton's potential presidential run. 

Gowdy said he's willing to move on with the investigation right now, but won't do so without the documents. 

"I am willing to take her within 30 days of the State Department giving us the documents that we are entitled to. I don't know I can be any more fair and less political about it," said Gowdy. 

Watch the discussion above.