In Arizona on Wednesday, the Democratic secretary of state, Katie Hobbs, issued a statement lamenting the “consistent and systematic undermining of trust” in the elections and called on Republican officials to stop “perpetuating misinformation.” She described threats against her and her family in the aftermath of Joseph R. Biden Jr.’s victory over Mr. Trump in her state.

In Georgia, where Mr. Biden holds a narrow lead that is expected to stand through a recount concluding Wednesday night, Secretary of State Brad Raffensperger, a Republican, has said he, too, received menacing messages. He also said he felt pressured by Senator Lindsey Graham, a close Trump ally and the chairman of the Senate Judiciary Committee, to search for ways to disqualify votes…

The extraordinary assault on the voting system by the president and his allies has taken on added intensity as the deadlines for certifying results in several states approach. Once certified, the final tallies will further forestall Mr. Trump’s attempt to overturn his loss.

Barring some breakthrough in the president’s legal push, his strategy appears to center on disrupting the process through which states finalize their vote counts and submit their delegate slates to the Electoral College.