(CNN) – President Barack Obama's plea for donations from Air Force One was "a routine fund-raising call," according to a senior campaign official.
The call, which the official confirmed took place Friday, was recorded and posted in part on the Daily Beast.
"The majority on this call maxed out to my campaign last time. I really need you to do the same this time," the president said on the call, which took place aboard the presidential aircraft as it was flying back from Colorado after Obama surveyed fire damage in the area and made remarks.
"I'm asking you to meet or exceed what you did in 2008," Obama said.
His call revealed a certain degree of resignation, saying the slow pace of change was hurting his ability to raise campaign cash.
"In 2008 everything was new and exciting about our campaign," Obama said. "And now I'm the incumbent president. I've got gray hair. People have seen disappointment because folks had a vision of change happening immediately. And it turns out change is hard, especially when you've got an obstructionist Republican Congress."
On the call, Obama affirmed an anxiety on the part of his campaign that their GOP rivals, including former Massachusetts Gov. Mitt Romney and his aligned super PAC, would out-raise them ahead of November's general election.
"If things continue as they have so far, I'll be the first sitting president in modern history to be outspent in his reelection campaign," Obama said on the call.
In May, Romney's organization outraised the president's by a $15 million margin, the first time in monthly fund-raising reports the Republican candidate has brought in more money than the president. In 2008, Obama broke all campaign fund-raising records, bringing in more than $700 million.
The official said Monday that Obama used a separate phone on Air Force One dedicated to political phone calls that is not paid for by taxpayers.