NEW : Democrats accuse Democrats of an `` assault on the First Amendment The Supreme Court Supreme Court stops Democrats from ending debate on a campaign finance bill . Senate Minority Leader Mitch McConnell , R-Kentucky , slammed the bill as a `` partisan effort , pure and simple . '' The bill would require groups paying for ads to disclose their top donors in the ads . Democrats claim the bill is necessary to reduce the impact of a GOP ruling .
NEW : Democrats accuse Democrats of an `` assault on the First Amendment The Supreme Court Supreme Court stops Democrats from ending debate on a campaign finance bill . The bill would require groups paying for ads to disclose their top donors in the ads . Democrats claim the bill is necessary to reduce the impact of a GOP ruling .