Obama Spends Most of $3.5 Million Ad Budget Online

Presidential candidate Barack Obama has spent almost $3.5 million in online advertising this year. More than $2.8 million of the estimated $3.47 million spent went to advertise through Google.

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Obama for America filed the report with the Federal Election Commission. The itemized info tracks ad campaign spending from January through April 2008.

Details show the Obama camp spent $640,000 in January on online advertising, $1.9 million in February, $888,000 in March and $234,000 in April. Other media buys went to Web sites like Politico for $36,000, CNN.com for $24,000 and Gothamist for $2,800.