The House committee investigating the Jan. 6 attack on the Capitol issued new subpoenas on Monday for a half-dozen allies of former President Donald J. Trump, including his former national security adviser Michael T. Flynn, as it moved its focus to an orchestrated effort to overturn the 2020 election.
The subpoenas reflect an effort to go beyond the events of the Capitol riot and delve deeper into what committee investigators believe gave rise to it: a concerted campaign by Mr. Trump and his network of advisers to promote false claims of voter fraud as a way to keep him in power. One of the people summoned on Monday was John Eastman, a lawyer who drafted a memo laying out how Mr. Trump could use the vice president and Congress to try to invalidate the election results.
In demanding records and testimony from the six Trump allies, the House panel is widening its scrutiny of the mob attack to encompass the former president’s attempt to enlist his own government, state legislators around the country and Congress in his push to overturn the election.
Mr. Flynn discussed seizing voting machines and invoking certain national security emergency powers after the election. Mr. Eastman wrote a memo to Mr. Trump suggesting that Vice President Mike Pence could reject electors from certain states during Congress’s count of Electoral College votes to deny Joseph R. Biden Jr. a majority. And Bernard Kerik, the former New York police commissioner who was also subpoenaed, participated in a planning meeting at the Willard Hotel in Washington on Jan. 5 after backing baseless litigation and “Stop the Steal” efforts around the country to push the lie of a stolen election.
“In the days before the Jan. 6 attack, the former president’s closest allies and advisers drove a campaign of misinformation about the election and planned ways to stop the count of Electoral College votes,” Representative Bennie Thompson, Democrat of Mississippi and the committee chairman, said in a statement. “The select committee needs to know every detail about their efforts to overturn the election, including who they were talking to in the White House and in Congress, what connections they had with rallies that escalated into a riot and who paid for it all.”
The panel also issued subpoenas for Bill Stepien, Mr. Trump’s campaign manager, who supervised its conversion into a “Stop the Steal” operation; and Jason Miller, a senior adviser to the campaign who participated at the Jan. 5 meeting at the Willard, where associates discussed pressuring Mr. Pence not to certify the Electoral College results.
Also included in the group that received subpoenas on Monday was Angela McCallum, the Trump campaign’s national executive assistant, who left a voice message for an unknown Michigan state representative in which she said she wanted to know whether the campaign could “count on” the representative to help appoint an alternate slate of electors.
The subpoenas — which bring to 25 the number issued by the committee — require that the witnesses turn over documents this month and sit for depositions in early December. More than 150 witnesses have testified in closed-door sessions with the committee’s investigators.
In a statement on Monday evening, Mr. Kerik said his lawyer had accepted the committee’s subpoena, but he defended his actions. He said that Rudolph W. Giuliani, Mr. Trump’s personal lawyer, had brought him into the legal effort to investigate claims of voter fraud, but he argued that he had nothing to do with plans to try to sway Congress.