The Supreme Court today voided the “millionaire’s amendment,” ruling by 5-4 that the law—which raised donation limits for candidates who face wealthy, self-financed opponents—violates the First Amendment, the AP reports. The majority said it would have been a different story if all candidates saw their limits raised. Notably, Barack Obama (in his Senate primary) may be the biggest beneficiary of the 2002 law to date. (More campaign finance stories.)