Republicans Who Led 2020 Election Denial Now Sowing Doubt in 2024 Votes

Starting in late 2020, Representative Scott Perry was one of the ringleaders of the Republican plot to use the House’s constitutional role in certifying the electoral count to delegitimize the results in a bid to help Donald J. Trump overturn the outcome.

Now, Mr. Perry and a handful of his Republican colleagues are taking action to also call into question an aspect of this year’s election, helping to lay the groundwork for what could become another effort to undermine the results should Mr. Trump lose again.

Mr. Perry and five other Republican members of Congress from Pennsylvania are plaintiffs in a lawsuit against their state’s government that seeks to set aside ballots from members of the military and Americans living overseas, charging that the system for verifying them is insufficient.

Mr. Trump has encouraged the notion. He posted on Truth Social last month: “The Democrats are talking about how they’re working so hard to get millions of votes from Americans living overseas. Actually, they are getting ready to CHEAT!”

Election officials and other experts say that the claims from Mr. Trump are meritless and that the overseas voting system is safe from fraud. Yet the case is one of about 100 filed this year by Republican allies of Mr. Trump — about 30 have been lodged so far in the two months before Election Day — many of which make unfounded claims about voter rolls and noncitizen voters.

They coincide with widespread claims by Mr. Trump and others that the election will be rigged. Together they could help pave the way for yet another challenge to the results if the former president is defeated.