She said Friday at a Cleveland campaign stop, "Make no mistake, by doing that, he is threatening our democracy." She said that America knows "the difference between leadership and dictatorship."
Trump, meanwhile, has said he's merely reserving the right to contest the results if the outcome is unclear or questionable. Underpinning his threat is his contention — presented with no evidence — that the election is "rigged" against him and may be soiled by widespread voter fraud. He's urged supporters to "monitor" polling places for potential shenanigans.
Fanning those flames, Russia's government has asked Oklahoma and two other states to allow Russian officials to be present at polling stations on Election Day, to study the "US experience in organization of voting process." Allegations by the U.S. government that Russia is trying to influence the election by hacking Democratic groups has fed a Clinton camp claim that Russian President Vladimir Putin is siding with Trump.
The Oklahoma secretary of state's office said Friday it had denied the Russian request, in line with state law. At the White House, press secretary Josh Earnest said it was unclear what Moscow was trying to do.
"It's appropriate that people might be suspicious of their motives," Earnest said.
Early voting is underway in more than 30 states. Clinton, reaching for voters who may be reconsidering their support for Trump, said in Ohio that she knows they still have questions about her. "I want to answer them," she said. "I want to earn your vote."
With the final debate behind them, the two candidates appeared together Thursday night for likely the last time in the campaign, at a Catholic fundraiser that turned unusually hostile.