Republicans are hoping to secure another landmark Supreme Court win undoing campaign finance limits.

The court will hear a case Tuesday that could upend how campaigns and party-affiliated groups coordinate their spending, fundamentally changing how party committees spend tens of millions of dollars every election cycle, particularly on TV advertising in congressional races. The GOP is seeking to overturn federal limits on coordinated spending between parties and candidates. A ruling ending those coordination rules would allow party groups to pour unlimited sums of money into ads across the country, potentially at a cheaper rate.

Republicans’…

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