NYT:

The House committee investigating the Jan. 6 attack on the Capitol subpoenaed two of Donald J. Trump’s campaign aides and Republican Party officials from battleground states on Tuesday as it dug deeper into a plan to use false slates of electors to help the former president stay in office after he lost the 2020 election.

The use of bogus slates of electors was one of the more audacious gambits employed by allies of Mr. Trump to try to keep the presidency in his hands, and the committee’s members and investigators have made it increasingly clear in recent days that they believe the effort — along with proposals to seize voting machines — was a major threat to democracy.

Among those subpoenaed on Tuesday were Michael A. Roman and Gary Michael Brown, who served as the director and the deputy director of Election Day operations for Mr. Trump’s campaign. The panel also summoned Douglas V. Mastriano, a Pennsylvania state senator; Laura Cox, the former chairwoman of Michigan’s Republican Party; Mark W. Finchem, an Arizona state legislator; and Kelli Ward, the chairwoman of Arizona’s Republican Party.

In letters accompanying the subpoenas, the committee said it had obtained communications that showed Mr. Roman’s and Mr. Brown’s “involvement in a coordinated strategy to contact Republican members of state legislatures in certain states that former President Trump had lost and urge them to ‘reclaim’ their authority by sending an alternate slate of electors that would support former President Trump.”