A new ad attacking Republican U.S. Senate candidate Bob Schaffer for his ties to oil companies does not provide voters with context on the candidate’s dealing with the energy sector, CALL7 Investigators found in their Vote08: Facts or Fiction series.

The ad attempts to paint Schaffer as a stooge of oil companies, which have faced the ire of voters upset at skyrocketing gas prices.

“When you look at Bob Schaffer’s resume, one thing comes through - oil. In Congress, Bob Schaffer voted to give $13 billion in tax breaks to gas and big oil,” the ad by the League of Conservation Voters says.

Fact is that Schaffer did vote for a bill that included the tax breaks but it also included $2 billion in money for renewable energy and as well as other environmental provisions.

"It's an important omission,” said University of Colorado professor Jerry Hauser, who studies campaign commercials. “When you think about money that goes to an industry such as oil and gas, one thing you need to ask yourself: What specifically was it, in this case tax breaks, and what did that permit or what was the gain that came from that piece of legislation.”

The ad is also critical of the job Schaffer took after leaving Congress.

“Schaffer then became an executive at a big oil company. And went to Iraq to secure a contract for Iraqi oil,” the commercial says.

Both of those claims are true. Schaffer campaign manager defends those actions, saying oil companies create a lot of jobs for Colorado residents.

The ad also takes Schaffer to task for contributions he received from oil interests.

"So, it's no surprise that Schaffer’s campaigns have taken $150,000 from gas and big oil,” the ad says.

While the claim is true, it does not provide voters with context to judge the contributions. The $150,000 includes campaign contributions going as far back as 1996 and are a small percentage of the millions Schaffer has raised for his congressional and senate campaigns.

League political director stood by the ad, saying Schaffer's record shows that he is more interested in helping oil interests than renewable energy.