Pence won't testify before Capitol panel

Former US vice-president Mike Pence says he will not testify before the House of Representatives panel probing the January 6, 2021, attack on the US Capitol because Congress "has no right to my testimony".

In an interview with CBS News, Pence said it would establish a "terrible precedent for the Congress to summon a vice-president of the United States to speak about deliberations that took place at the White House".

In high-profile hearings, the House panel has highlighted Pence's refusal to go along with former President Donald Trump's efforts to overturn his defeat to Democrat Joe Biden in the 2020 presidential election.

Pence had to go into hiding for hours when Trump supporters stormed the Capitol on January 6 in an unsuccessful effort to prevent Congress from certifying Biden's victory.

Pence, a potential Republican presidential candidate, writes about those events in a book released on Tuesday, and several of his former staffers have provided testimony to the committee.

Pence, however, said he would not co-operate voluntarily.

"I'm closing the door on that," he said.