U.S. Supreme Court leaves key campaign finance restriction in place

By Lawrence HurleyWASHINGTON (Reuters) - The U.S. Supreme Court on Monday turned away a Republican challenge to a federal campaign finance restriction that prevents political parties from raising unlimited amounts of cash to spend on supporting candidates.The Republican Party of Louisiana had argued that a provision of the 2002 Bipartisan Campaign Reform Act violates free speech rights under the U.S. Constitution.The brief order noted that conservative Justices Clarence Thomas and Neil Gorsuch f