A lingering distrust of mail-in voting among Republicans, fueled largely by former President Donald Trump’s persistent claims of fraud in the 2020 election, continues to affect the party’s electoral strategies and voter turnout efforts. Despite mail-in voting being widely regarded by experts as a secure and neutral method, its reputation has been significantly damaged within Republican ranks, complicating efforts to mobilize the party base.

Before 2020, research indicated that absentee voting did not systematically favor either party, though Republicans generally exhibited some skepticism about the practice. This skepticism was partly rooted in longstanding concerns about voter fraud, including claims related to illegal immigrants casting ballots. However, it was Trump’s public and repeated assertions of widespread fraud that deepened the partisan divide on mail-in voting. During the 2020 presidential campaign and in the months following the election, Trump repeatedly alleged that mail ballots were being manipulated, despite little evidence of fraud beyond isolated incidents involving hundreds of votes—far fewer than the millions needed to affect the election outcome.

The coronavirus pandemic initially amplified these divisions. While Democrats largely embraced mail-in and early voting to avoid health risks at polling sites, many Republicans, less concerned about COVID-19 exposure, preferred voting in person. By the 2024 election cycle, the gulf had widened further: 37% of Democrats cast ballots by mail, compared to just 24% of Republicans. Beyond behavior, the parties differ sharply in their perceptions of election integrity; surveys show that 74% of Republicans consider fraud a major or minor problem in presidential elections, contrasted with 34% of Democrats.

This erosion of trust has tangible consequences for Republican voter outreach. Prior to Trump's involvement, support for no-excuse absentee and early voting among Republicans exceeded 50%, but that figure has since declined to approximately 34%. Voting experts note that absentee and early voting procedures historically boost participation by providing convenience and mitigating risks such as weather or mechanical issues on Election Day.

Republican operatives find themselves in a difficult position, attempting to restore confidence in mail-in voting even as Trump continues to undermine it. Though the former president briefly endorsed mail voting in 2024, he quickly reverted to criticizing it and recently sought to restrict mail-in ballots in certain states, prompting a federal judge to block the order. While the administration frames its efforts as an audit to ensure ballots reach only eligible voters, critics argue it represents federal overreach into state-run elections.

Meanwhile, Republican-affiliated political action committees are investing significant resources to encourage party voters to use mail-in ballots, highlighting a paradox: as Trump fights to delegitimize the process, other Republicans work to reclaim its credibility. This ongoing dynamic could affect voter turnout and ultimately influence the balance of power in the upcoming midterm elections and future presidential races.