Donald Trump supporters rioted at the US Capitol on 6 January 2021. (Photo by AP)

A US House panel, investigating the deadly January 6 Capitol attack, reportedly has evidence that suggest former President Donald Trump oversaw a criminal conspiracy to stop President Joe Biden’s certification with the carnage last year, says a report.

The House select committee has evidence that suggests Trump allegedly connected the White House’s scheme to stop Biden’s certification, The Guardian reported, citing two senior sources familiar with the matter.

The Trump White House, according to the sources, briefed a number of House Republicans on its plan for then Vice President Mike Pence to abuse his ceremonial role and not certify Biden’s win.

Two weeks before Biden’s presidency, Trump’s supporters stormed the Capitol building, where lawmakers were in the process of confirming Biden’s win in the 2020 presidential election.

Pence certified Biden’s election victory, despite pressure from the White House and the bloody attack that resulted in the death of at least five people, including a police officer.

The Guardian report says the select committee has several thousand messages, among which include one allegedly sent by an unnamed Republican lawmaker, saying that 6 January was a terrible day not because of the Capitol breach, but rather due to the failure to prevent the certification of the election results.

Members and the counsel on the select committee are examining whether Trump and his aides violated the federal law, in seeking to stop the certification.

The panel is also looking at whether Trump oversaw an unlawful conspiracy that involved coordination between the political elements of the White House plan communicated to Republican lawmakers and extremist groups that stormed the Capitol, they said.

A large number of people, including extremists with histories of violence, had vowed on social media to take up arms and storm the Capitol to stop the certification process.

Trump, who had claimed for weeks that the election was marked by massive electoral fraud, urged his supporters to fight like hell to stop the election from being stolen.

Trump was impeached, for the second time, for inciting his supporters to storm the Capitol building on the opening weeks of Biden’s presidency. The Republican president, however, was ultimately acquitted.