Former Massachusetts Gov. Mitt Romney has spent the most on TV advertising so far among presidential contenders.
WASHINGTON (CNN) - A wide-open presidential race and a willingness by candidates, interest groups, unions and corporations to buy TV time will lead to historic spending for political and issue-advocacy advertising in the 2008 election cycle, an analysis shows.
The cost to try to influence the 2008 election could exceed $3 billion, according to TNS Media Intelligence/Campaign Media Analysis Group, CNN's consultant on political television advertising.
This is nearly twice as much than what was spent in 2004 when political and issue-advocacy television advertising rang in at $1.7 billion. In 2006, $2.3 billion was spent on political and issue-advocacy TV commercials.
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- CNN Political Editor Mark Preston