(Credit: Getty Images)

If you're looking for the latest sign that the general election campaign is already underway, look no further than the homepages of "Obama for America" and "Mitt Romney for President."

On these sites, a head-to-head fundraising duel is taking place over comments both men have made about the prospect of a second Obama term.

At MittRomney.com, President Obama's face is plastered on a banner calling for donations to a  "One Term Fund" aimed at netting $1 million for Romney to send "One message: Let's hold him accountable."

The fund is a reference to Obama's  comment from three years ago on his plan to fix the economy. "If I don't have this done in three years, then there's going to be a one-term proposition," he said.

Meanwhile, Team Obama, which now treats Romney as the presumptive nominee, has one-upped the Republican challenger with a  "Two-Term Fund" to raise $2 million for the president.

"Mitt Romney's campaign just launched his One-Term Fund with a million-dollar goal," the Obama site reads. "Here's why, in Mitt Romney's words: 'We must not forget what this election is really about: defeating Barack Obama.'"

It continues, "Don't let that happen. Make a donation today."

A real-time ticker on the Obama campaign site showed that more than 34,775 supporters had donated over $1.4 million as of Thursday evening.

The site also directly references Romney's total, which was already close to its $1 million goal.

A  video on the "One-Term Fund" webpage highlights the Obama campaign's focus on Romney's candidacy, suggesting the Democrats are "nervous."