The US Supreme Court heard arguments on Tuesday in a Republican challenge to campaign finance rules that could impact next year's midterm elections.

Among those bringing the case is Vice President JD Vance, who joined when he was running for the Senate in 2022 and is now considered a potential candidate for the Republican presidential nomination in 2028.

At issue in the case brought by the Republican Party is limits on the amount of money political parties can spend in coordination with their candidates.

In Citizens United, a landmark 2010 case, the Supreme Court lifted restrictions on campaign spending by corporations, unions and other outside groups.

But political parties are still restricted, however, on how much they can spend on advertising, for example, in coordination with indiv

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