The Supreme Court on Friday halted a lower-court ruling that had blocked political party committees from receiving the Federal Communications Commission’s lowest unit charge for certain broadcast advertising, restoring the discount as the midterm election advertising period began. The order primarily benefits Republican organizations, which generally raise more money through party committees than Democrats. The National Republican Congressional Committee has reserved $10.8 million in television advertising for 23 House races this month, while Republican committees say they budgeted tens of millions of dollars at the lower rates. The high court said the challenge to the FCC guidance was premature and that rescinding the rates could harm the committees’ ability to reach voters. Justice Ketanji Brown Jackson dissented. Four Democratic candidates, including Rep. Kristen McDonald Rivet, former Sen. Sherrod Brown, Sen. Jon Ossoff and former Gov. Roy Cooper, sued over the policy. The underlying eligibility dispute remains unresolved.