NEW : Republicans accuse Democrats of an ` ` assault on the First Amendment '' Democrats `` fear the righteous judgment of the American people in this coming election , '' warned Sen. John Cornyn , R-Texas , who spearheads the Senate Republicans ' election effort . The Senate GOP stops Republicans 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 Supreme Court decision .
NEW : Republicans accuse Democrats of an ` ` assault on the First Amendment '' The Senate GOP stops Republicans 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 Supreme Court decision .