“The Senate GOP campaign arm won a major Supreme Court boost in the party’s bid to hold congressional majorities on Tuesday,” Axios reports.“Republicans’ reliance on mega-donors and their cash-flush committees positions them to benefit more than Democrats from the ruling, which allows committees to spend unlimited sums in coordination with candidates as they push against headwinds in November.”“GOP officials reacted with glee to the Tuesday ruling, deriding Democrats who have criticized the decision for giving more power to the wealthiest donors.”Bloomberg: Supreme Court opens midterm ad floodgates, giving GOP an edge.