(Updated at 8:40 p.m. ET)
(CNN) - The Democratic Senatorial campaign committee is out Saturday with a new attack ad that paints senior Missouri Rep. Roy Blunt as a symbol of Washington insider politics and condemns the Senate candidate for voting for the federal government's massive bailout of the financial industry in 2008.
"A culture of corruption and special interests where Missouri gets left behind," the DSCC's ad says. "And, when our economy collapsed, Washington is where Roy Blunt took the lead and voted for the $700 billion Wall Street bailout."
The bill passed largely due to the support of Democrats - 172 of them voted for the bailout package. It passed the House in October 2008 with 263 votes and with members of both parties split on the issue.
The 30-second television ad calls Blunt "one of Congress' most corrupt politicians," a reference to the unflattering designation bestowed upon him in 2005 and 2006 by the advocacy group Citizens for Responsibility and Ethics in Washington.
Blunt, a seven-term congressman who held a leadership role in the House GOP caucus until last year, is running for Senate against Democratic Missouri Secretary of State Robin Carnahan. Both candidates are vying to succeed Republican Sen. Kit Bond, who is not running for re-election this year. The race is one of the few where the Democrats have a chance to pick up a GOP-held seat.
Blunt's campaign spokesman issued a statement Saturday night that accused the DSCC of hypocrisy.
"Robin Carnahan is so desperate to hold on to her family dynasty of three generations of Washington politicians that she will say and do anything," Blunt campaign spokesman Rich Chrismer said. "Robin Carnahan has repeatedly stated her belief that the 2008 emergency economic package was 'absolutely' necessary to prevent a worse economic disaster. Now Robin Carnahan's liberal Washington allies are attacking Roy Blunt for a vote Carnahan said was 'absolutely' necessary."
The statement refers to a 9-second audio clip that Blunt's campaign put online of Carnahan saying "Absolutely, absolutely" to a woman who suggests that if "the bailout hadn't happened, there could've been a worse financial problem."
Carnahan's campaign spokesman, Linden Zakula, told CNN that saying "Absolutely" was the equivalent of saying "Mmhmm" as somebody speaks, and said that Carnahan stated her opposition to the bailout moments after the 9-second clip ends. Zakula pointed to a number of news articles in which Carnahan clearly states that she would have voted against the bailout legislation.
According to a recent Mason-Dixon poll conducted July 19-21 for the St. Louis Post-Dispatch and KMOV-TV, Blunt leads Carnahan by a 48-42 point margin, with 10 percent undecided. The survey's sampling error was plus or minus four percentage points.
(Updated Sunday at 2:30 p.m. ET with Carnahan reaction)