In the final hours before the midterm elections, some Americans say they are worried about federal interference in the vote and potential efforts by Republicans to overturn the results if the party is unsuccessful.

For years, President Trump has sowed doubts about the nation’s electoral system by promoting debunked claims of mail-ballot fraud, faulty voting machines and voting rolls riddled with noncitizens. As polls show the Republican majority in Congress in peril, Mr. Trump has ramped up his baseless attacks, even dangling a $1 million reward to tipsters who help secure a voting-fraud conviction.

Some voters are nervous about what he might do next.

“I am very concerned that the election will be disrupted in ways that will affect the margins,” said Tiffany Hall, a 56-year-old physician who lives in a suburb of Cincinnati.

Civil rights groups and labor unions recently sued the Trump administration, seeking to block the potential deployment of federal agents at the polls.

Ms. Hall, who is Black, voted early on Saturday with her husband and her teenage daughter, who was voting for the first time. Ms. Hall invoked the struggles of the civil rights movement and said she was worried about efforts to suppress the vote.

With Election Day around the corner, states have been working hard to prepare, with some adopting new congressional maps and voting rules on top of normal election security measures. 

While President Donald Trump persists in making unfounded claims about the security and integrity of the nation’s elections, the Department of Justice is planning to send 1,000 election monitors to all 50 states, more than double the number dispatched during the 2022 midterms.

READ MORE: How some states are responding to DOJ’s plan to send 1,000 monitors on Election Day

As part of our coverage of the midterm groundwork happening across the country, PBS News’ Liz Landers and Votebeat editorial director Jessica Huseman hosted a Reddit “Ask Me Anything” Q&A on Wednesday to address people’s questions on election security.

Several questions touched on people’s concerns about their vote being tampered with or not being counted, alongside broader concerns about possible meddling from the federal government.

The Trump administration is attempting measures that haven’t been tried before, Huseman said. Those actions include attempts to change election rules through executive orders, repeated demands for voter data and efforts to expand the government’s role – specifically the executive branch – in elections. All of this amounts to an “unprecedented environment now,” she said.

And yet, “elections officials are confident the system will hold,” she added.

Here are five major takeaways from the Reddit AMA.