The Jan. 6 riot hearings are delivering some startling testimony. Are they changing minds?

Around 1 p.m. ET Tuesday inside the Caucus Room of the Cannon House Office Building, near the U.S. Capitol, the murmuring among the roughly 70 spectators and 100 journalists quieted down as an ex-aide to Donald Trump's former chief of staff entered through the back doors and sat at the witness table, where hovering photographers snapped away.

Journalists were squeezed into the 10 assembled tables for the abruptly called hearing by the House panel investigating the Jan. 6  riot. Last week, it was announced that there would be no more hearings until July. But on Monday, the panel unexpectedly said it was convening a hearing to present "recently obtained evidence and receive witness testimony." 

That witness was Cassidy Hutchinson, who made a series of startling claims, including that, on Jan. 6, the then-president was informed that people rallying nearby that morning had weapons but he told officials to "'let my people in'" and march to the Capitol.

Yet despite her headline-making testimony, and other revelations from the hearings, so far it seems unclear how much of it is resonating with the American public, or changing minds.

"The evidence of impact at the hearings thus far is hard to come by," said William A. Galston, a chair and senior fellow of governance studies at the Brookings Institution.

The first night of the hearings, the panel laid out the beginnings of its case against Trump — that his lies about the 2020 election and his pressure on Vice-President Mike Pence to overturn it directly led to the violence on Jan. 6, 2021.

Those hearings were televised on prime time, and drew an audience of about 20 million people, equivalent, as The New York Times pointed out, to television events like a big Sunday Night Football game.

But by the second hearing, broadcast in the afternoon, the audience had dropped by nearly half to 11 million. That followed to nine million the third day. 

The committee has heard from a number of Trump's former top aides, and Republican after Republican, who have said they told Trump they didn't believe his claims of election fraud.

It's heard testimony from former attorney general Bill Barr, presented through a video recording, that revealed he had told Trump there was no evidence of voter fraud, that he didn't agree with the idea of saying the election was stolen — yet in Trump, said Barr, "there was never an indication of interest in what the actual facts were."

The hearings also heard about a plan by conservative lawyer John Eastman, which he presented to Trump and which aimed to reverse Joe Biden's election victory. 

As well, the hearings heard that Trump hounded the U.S. Justice Department to pursue his false election fraud claims, contacting the agency's leader "virtually every day" and striving in vain to enlist top law enforcement officials in a desperate bid to stay in power.

But an ABC News/Ipsos poll found that only 34 per cent of Americans are following the hearings somewhat or very closely, with only nine per cent following it very closely. 

The poll also revealed that, of those following closely, 43 per cent are Democrats and 22 per cent are Republicans.