Obama says he's up against the most expensive campaign "in history"

(CBS News) As his bus tour rolls through Ohio, President Obama told a crowd in Sandusky that he is facing an uphill battle this election when it comes to matching his Republican rival's campaign cash.

Mitt Romney and his supporters will spend "more money than any time in history," the president told a few hundred supporters Thursday in Sandusky, Ohio, a town between Toledo and Cleveland with a population of about 25,000.

The president's remarks came shortly after reports surfaced that Romney and his joint fundraising arm with the Republican National Committee raised $100 million in June.

It was the second month in a row that Romney has outraised the president, something Mr. Obama is not exactly accustomed to. During the 2008 campaign, then-candidate Obama broke every fundraising record - including the still-standing monthly fundraising record of $150 million - on his way to a total of $750 million dollars.

But in Sandusky, which is the second stop on a two-day bus tour through Ohio and Pennsylvania, Mr. Obama told the crowd that the money will be used to paint the president in a negative light.

"Every ad's the same," the president said. "The economy's not good and it's Obama's fault," he said mimicking Republican attack ads. He cautioned that repetitive ads will make people "discouraged" and "cynical" so people "don't participate."

"That's what the other side is counting on," he said.

The president briefly mentioned the health care law, which the Supreme Court upheld last week, and urged the conversation to move on, as he did on the day of the Court's decision.

"We don't need to reargue the last two years," he said, adding that the health care law "was the right thing to do."

Mr. Obama rarely mentioned his opponent's name during the nearly 30-minute speech, but it was clear who he was talking about. He repeated a common refrain and theme that has emerged during his campaign: There are "two fundamentally different visions in this election."

Without giving detailed specifics, the president said he said he would invest in education, transportation, manufacturing and veterans. He said he would balance the budget "in a responsible way."

"I'm running because we have more to do," he said.

He characterized Romney's vision as helping "wealthy investors" and letting it "trickle down and everybody else will do better."

"Here's the problem: We tried that before I came into office... and it didn't work," he said.