(CNN) -- The chairman of the Republican National Committee on Friday predicted the tables would soon turn in the presidential election, saying Americans can expect to see a lot more of Mitt Romney due to fund-raising hauls by the GOP.
"We now are in a position to oustpend (President Barack Obama's re-election effort) on television and tell our story and tell the Mitt Romney story, starting with our convention and going through the fall," Reince Priebus said on CNN's "Starting Point."
Recent polls have shown Romney's popularity is slipping, including a new CNN/ORC International survey released Thursday that indicates 48% of Americans have an unfavorable view of the presumptive GOP nominee, up from 42% in June.
Defending Romney, Priebus blamed the numbers on negative ads by the Obama campaign, saying the former Massachusetts governor has been the subject of attacks by the other side for a year.
"What you're seeing is the effect of tens of millions of dollars that are on TV," he said.
As of June 30, Obama's campaign had spent $153.6 million this cycle, compared to Romney's team at $106.5 million, according to Federal Election Commission reports.
But Romney's campaign, along with the Republican National Committee, raised $101.3 million in July, marking the third month in a row in which the Obama campaign and Democratic National Committee together were outraised by Republicans.
Once Romney becomes the official nominee at the GOP convention in late August, he'll be able to tap into more funds to spend in the final months of the race for the White House.
"I think you're going to see us being able to outspend our opponent at the end, whereas Barack Obama outspent us tremendously over the past year," Priebus said.
In fund-raising emails, the Obama campaign repeatedly says Obama will be the first incumbent president to be outspent by the opponent.
CNN's Ashley Killough contributed to this report.