WASHINGTON — Supreme Court justices on Tuesday probed the legality of long-standing campaign finance restrictions challenged by Vice President JD Vance that limit how much national party committees can spend in coordination with individual candidates.

It is unclear exactly how the court will rule. A lawyer defending the limits argued that the case should be dismissed as moot because of Vance's ongoing reluctance to reveal whether he will run for office in 2028.

The Supreme Court's conservative majority has long been skeptical of campaign finance restrictions on free speech grounds, and Republicans have often brought challenges against them. Some of those justices expressed skepticism about the limits during Tuesday's argument, while liberal justices defended them.

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