At its fourth hearing this month, scheduled for 1 p.m., the committee will seek to prove what was a recurring theme for the committee: that Mr. Trump knew – or should have known – that his lies about stolen elections and the plans he followed to stay in office were wrong, but that he promoted them anyway. The commission also plans to point out, in potentially emotional testimony, the vitriol and death threats suffered by election officials because of Mr. Trump’s lies. “We will show evidence of the president’s involvement in this plan,” said Adam B. Schiff, a California Democrat and member of the committee, on CNN’s “State of the Union.” “We will again show evidence of what his lawyers are thinking about this plan,” he continued. “And we will show courageous government officials who have stood up and said that they will not go along with this plan, nor call the legislature again, nor ratify the results for Joe Biden.” Mr Schiff, who will play a key role in Tuesday’s hearing, told the Los Angeles Times that the commission would release new information about the deep involvement of Mark Mendous, Trump’s last chief of staff. Among the evidence, Mr. Siff said, would be text messages revealing that Mr. Meadows wanted to send “Make America Great Again” hats to people conducting elections in Georgia. The first witness at the hearing will be Rusty Bowers, a Republican who chairs the Arizona House of Representatives. Mr. Bowers withstood the pressure to overthrow Mr. Trump’s election. Rudolph W. Giuliani, Mr. Trump’s personal lawyer. even Virginia Thomas, the wife of Judge Clarence Thomas. Mr. Bowers will describe the campaign of pressure from Mr. Trump and his allies, according to an aide to the commission. He will also describe the harassment he suffered before and after January 6 and its impact on his family, the aide said. The committee will then hear testimony from Brad Rafensperger, Georgia’s foreign minister, and Gabriel Sterling, the foreign minister’s chief of staff, who were pressured to overturn their state election results. In a telephone conversation, Mr. Trump pushed Mr. Rafensperger to “find” enough votes to put the state in his column and threatened him vaguely with a “criminal offense.” Finally, the committee will listen to Shaye Moss, a Georgia election worker who was the target of a right-wing defamation campaign. Ms. Moss and her mother, Ruby Freeman, who both processed ballot papers in Atlanta during the 2020 Fulton County Council election, have filed a defamation suit against The Gateway Pundit, a right-wing conspiracy site that published dozens of false stories about them. The stories described the two women as “crooked Democrats” and claimed that “they took out suitcases full of ballot papers and started counting these ballots without election observers in the hall.” Ms. Moss and Ms. Freeman also sued Mr. Giuliani, saying he “bears substantial and great responsibility for the campaign of partisan assassination” that they faced. Investigations by the Georgia Foreign Ministry’s office found no wrongdoing on the part of the two women. The campaign of pressure on government officials came as Trump’s campaign was rigging voter lists in seven states won by Joseph R. Biden Jr. The commission and federal prosecutors were investigating how these plates were used by Mr. Trump’s allies in an attempt to disrupt the normal functioning of the January 6 Congressional Electoral College certification. The fourth hearing comes as the commission continues to build its case against Mr. Trump, presenting evidence of how he spread lies about the election results, then raised hundreds of millions of dollars from those lies and how he tried to stay in power by pushing Vice President Mike Pence to reject legitimate ballots. A fifth hearing scheduled for Thursday will examine Mr. Trump’s efforts to intervene in the Justice Department, including the possibility of dismissing the attorney general because he is not in line with his plans. The committee continues to gather information as it conducts its hearings. The panel recently sent a letter to Ms. Thomas, named Ginny, asking her to interview her for communications with John Eastman, a conservative lawyer who advised Mr. Trump on how to reverse the election, and later unsuccessfully sought Sorry. “We believe you may have information about John Eastman’s plans and activities related to our investigation,” the commission wrote in a letter to Thomas New York Times. As the commission investigates how Mr. Trump’s lies sparked death threats against election workers, a commission member on Sunday revealed some of the vitriol he had endured. Lawmaker Adam Kinzinger, an Illinois Republican, posted a letter on Twitter threatening to kill his family. “This threat came in at my house,” Kinsinger told ABC’s “This Week,” adding: “We took her a few days ago and she is threatening to execute me and my wife and child. months. We have not seen and we have never had such a thing “.