Updated at 3:44 p.m. ET

The members of the Senate Intelligence Committee had one question they asked again and again Wednesday of the country's intelligence chiefs: Did President Trump want you to downplay investigations surrounding Russia?

And time and again, the intelligence officials declined to answer.

At the often contentious hearing, Virginia Democrat Mark Warner, the committee's vice chairman, was the first to press the question. He asked the director of national intelligence, Dan Coats, and the head of the National Security Agency, Adm. Mike Rogers, about media reports that Trump asked them to intervene in the Justice Department investigation of former national security adviser Michael Flynn, and the broader inquiry surrounding Russia.

Both answered in broad terms.

"In the three-plus years I have been director of the National Security Agency, to the best of my recollection, I have never been directed to do anything illegal, immoral, unethical or inappropriate," Rogers said. "I do not recall ever feeling pressured to do so."

Coats responded in a similar vein.

"In my time of service," Coats said, "I have never been pressured, I've never felt pressure to intervene or interfere, in any way, with shaping intelligence in a political way."

However, neither would discuss their conversations with Trump, and declined to say if he asked them to take any action regarding the investigations.

Warner, along with several other senators, kept pushing and ultimately expressed frustration with the intelligence chiefs.

There are "reports, that nobody has laid to rest here, that the president of the United States has intervened directly in an ongoing FBI investigation and we've got no answers from any of you," Warner said.

The verbal sparring became so intense that Committee Chairman Richard Burr, a North Carolina Republican, intervened at one point during a sharp exchange between California Democrat Kamala Harris and Deputy Attorney General Rod Rosenstein.

"The chair is going to exercise its right to allow the witnesses to answer the question, and committee is on notice to provide witnesses the courtesy, which has not been extended all the way across," Burr said.

Republican John McCain of Arizona took a softer approach, drawing chuckles when he asked Coats, "Do you want to tell us any more about the Russian involvement in our election that we don't already know from reading The Washington Post?"

Coats did not offer any details, but said, "Just because it's in The Washington Post doesn't mean it's declassified."

The hearing brought four senior intelligence and law enforcement officials before the committee on Wednesday. In addition to Coats, Rogers and Rosenstein, Acting FBI Director Andrew McCabe also testified.

The hearing was highly anticipated because stories about the Russia investigation have emerged piecemeal, often based on anonymous sources. The intelligence chiefs are all key figures in the investigation, but have rarely spoken publicly, and not in one place, at one time, and under oath.