The Supreme Court has struck down limits on the overall amount an individual can donate to political campaigns, according to reports Wednesday.
CNN reported that the court's justices ruled that regulations in the Federal Election Campaign Act violate contributors' First Amendment rights.
The decision may affect November's congressional midterm elections and have a massive impact on campaigns, campaign fundraising and U.S. politics in general.
The ruling expanded how much political donors can give candidates and parties in federal elections by striking down a key pillar of campaign finance law.
In the 5-4 vote, the court struck down the overall limits on how much individuals can give to candidates, parties and political action committees in total during the federal two-year election cycle.
The ruling leaves in place base limits on how much a donor can give individual candidates and laws that require candidates, parties and political action committees to disclose information about donors.
The court was divided over the sweeping nthe ruling actually is. The biggest impact is that a single donor can now give the maximum amount by law to as many federal candidates, parties and committees as he or she wishes.
The 5-4 split was along party lines, with the five justices appointed by Republican presidents joining the majority and the four appointed by Democratic presidents dissenting.
Chief Justice John Roberts, writing on behalf of the court, said the justices did not reach the question of whether to overturn a key 1976 ruling, called Buckley v. Valeo, which upheld limits on campaign finance donations while also describing how courts should analyze such regulations. Justice Clarence Thomas, who voted with Roberts, said the court had gone further than the chief justice claimed.
Roberts said in his opinion that the aggregate limits violated the First Amendment of the U.S. Constitution, which protects free speech. He rejected the contention of President Barack Obama's administration that the limits are needed to fight corruption.
The caps "do little, if anything, to address that concern, while seriously restricting participation in the democratic process," wrote Roberts, appointed by former President George W. Bush, a Republican.
The decision comes four years after the court's landmark Citizens United v. Federal Election Commission ruling, which cleared the way for increased independent corporate and union spending during federal elections.
In a dissenting opinion, Justice Stephen Breyer said the ruling, along with Citizens United, "eviscerates our nation's campaign finance laws."
Wednesday's ruling could threaten the legal architecture that underpins other campaign finance regulations.
The aggregate limits have been in place, in various forms, since 1974, with the most recent version dating back to the 2002 Bipartisan Campaign Reform Act.
Republican donor Shaun McCutcheon, an Alabama businessman, and the Republican National Committee had challenged the contribution caps. Before Wednesday's Supreme Court decision, donors could not exceed the $123,200 overall limit during the two-year period.
The case is McCutcheon v. Federal Election Commision, U.S. Supreme Court, 12-536.
(Reuters contributed to this story. Reporting by Lawrence Hurley; Editing by Howard Goller)