The nation’s highest court has already provided assistance to President Donald Trump and Republicans in electoral map disputes this year, and additional rulings expected in the coming weeks could further benefit the party before November’s congressional elections.
One pending case from Mississippi involves Republican Party officials challenging state laws that permit mail-in ballots to arrive after Election Day, provided they bear an Election Day postmark. Trump has questioned mail-in ballot security, despite limited evidence of voting fraud, and Democratic voters utilize this voting method more frequently than Republicans.
A second case featuring Trump’s Vice President JD Vance centers on Republican efforts to reduce restrictions on campaign finance coordination between party organizations and candidates.
Republicans contend these limitations violate First Amendment free speech protections. The court has previously shown openness to such reasoning, notably in its 2010 Citizens United v. Federal Election Commission ruling.
Both decisions are anticipated by late June.
Republicans currently hold narrow control of both the House of Representatives and Senate heading into the November 3 midterm elections. Democratic victories in either chamber could obstruct Trump’s policy priorities and enable investigations into his administration.
The court maintains a 6-3 conservative majority. An April ruling driven by conservative justices in a Louisiana case weakened a crucial Voting Rights Act provision, making racial discrimination challenges to electoral maps more difficult under the civil rights legislation.
This decision immediately advantaged Trump’s party before the midterms, though legal analysts suggest the impact of upcoming rulings remains uncertain.
The Voting Rights Act decision enabled Republican state lawmakers to eliminate Democratic-controlled House districts with significant Black or Latino populations throughout the South, potentially providing Republicans electoral benefits for years. Black and Hispanic voters typically support Democratic candidates.
The ruling has been “a boon for Republicans,” according to Travis Crum, a Washington University in St. Louis School of Law professor.
Partially due to this decision, Republicans are positioned to potentially gain up to twelve House seats currently held by Democrats through redistricting processes in November.
However, Republicans face challenges from Trump’s declining approval ratings in public polling, stemming from the unpopular Iran war and resulting higher gasoline prices, plus the historical pattern of presidential parties losing congressional seats during midterms.
In the campaign finance case, Vance and other Republicans challenged a lower court decision upholding limits on coordinated party expenditures – money parties can spend on campaigns with candidate input. Vance was pursuing a U.S. Senate seat in Ohio in 2022 when he and other candidates filed suit.
The foundational 1971 federal election law treats party spending without candidate coordination as independent expenditures with no amount restrictions. However, it limits contributions coordinated between parties and campaigns.
Restriction supporters argue they prevent corruption. Without these limits, wealthy donors could influence candidates by channeling large sums through political parties, circumventing individual donation limits per election cycle.
Conservative election attorney Dan Backer believes eliminating coordinated spending limits would strengthen political parties, which “have a generally moderating impact” compared to special interest groups.
“The overall political system is benefited by very strong parties,” said Backer, who has represented Republican candidates and right-leaning organizations.
During December oral arguments, conservative justices seemed receptive to First Amendment arguments against these restrictions.
University of Minnesota political science professor Timothy Johnson predicted a likely Republican victory, potentially allowing them to leverage their fundraising superiority over Democrats.
Three major Republican committees – the Republican National Committee, National Republican Congressional Committee and National Republican Senatorial Committee – concluded April with $251 million in cash and no debt. This approximately doubled the $125 million held by Democratic counterparts, who also carried over $17 million in debt.
“There certainly is an advantage, monetarily, on the Republican side in terms of the party committees,” Johnson observed. “Once that ruling comes down, there could be coordination between those committees and candidates pretty instantaneously.”
Johnson noted that some individual Democratic candidates in prominent races have achieved impressive fundraising totals that could offset a Republican-favorable ruling.
The decision might prompt party committees to pursue the same discounted television and radio advertising rates long available to candidates, though election law experts said this raises untested legal questions.
The Citizens United ruling cited First Amendment protections while invalidating campaign finance restrictions and permitting corporations and outside groups like labor unions to spend unlimited amounts on elections.
The Supreme Court’s mail-in ballot “grace period” ruling could establish stricter voting regulations nationwide.
Mail voting has traditionally been popular among certain Republican voters, particularly rural and older demographics. However, Trump’s false fraud allegations, including claims about mailed ballots, following his 2020 loss to Democrat Joe Biden, have reduced Republican enthusiasm for the practice.
Trump signed an executive order in March targeting mail-in voting rules, prompting legal challenges over whether his directive violated state constitutional authority over election regulation.
In the 2024 election, 37% of Democratic voters used mail ballots compared to 24% of Republicans, according to MIT Election Lab data. During the 2020 COVID pandemic election, 60% of Democratic voters and 32% of Republican voters cast mail-in ballots.
The court heard arguments in March regarding Mississippi’s appeal of a lower court ruling that declared its mail-in ballot law illegal following a Republican Party challenge. The law allows mail-in ballots with Election Day postmarks to be counted if received within five business days of Election Day.
The dispute centers on whether federal laws establishing election dates override state laws permitting ballot receipt after Election Day.
During March arguments, most justices appeared prepared to invalidate Mississippi’s law.
The National Conference of State Legislatures reports that 14 states, plus Guam, Puerto Rico, the Virgin Islands and Washington, D.C., accept and count mailed ballots received after Election Day if postmarked on or before Election Day.
Crum suggested the justices might strike down Mississippi’s law while allowing it to remain effective for the midterms under the Purcell principle, which encourages courts to avoid changing voting rules close to elections to prevent voter confusion.
The Democratic National Committee filed a brief warning of “disastrous consequences” if the court supports Republicans in this case.
Eliminating Mississippi’s law and imposing inflexible Election Day deadlines for mail-in ballot receipt could disenfranchise millions of voters, “including military voters stationed away from home, overseas citizens, rural voters, elderly and disabled voters, and voters lacking reliable transportation.”
Chris McIsaac, a researcher at the R Street Institute libertarian think tank, considered requiring mail ballots to arrive by Election Day reasonable, but noted potential administrative challenges in implementing new rules months before an election.
“All of the voter communications and information that election offices publish in advance of elections that give the instructions for when ballots are due – that stuff happens pretty far in advance,” McIsaac explained. “Some of that would need to be reprinted.”
