Sununu said he usually disagrees with what Biden says, with one notable exception in 2007, during the Democratic primary, when Biden said Obama wasn’t ready for the presidency.

“Even with three years in office, he’s still demonstrating he still doesn’t have enough experience to be president,” Sununu said.

Sununu accused the White House of waging class warfare and of adopting an arrogant attitude toward tax policy.

“They’re telling people they know better how to spend the money,” Sununu said.

A prominent surrogate who has remained close to the Romney campaign since backing the former Massachusetts governor ahead of New Hampshire’s primary in January, Sununu said the Romney team would be transitioning into general-election mode now that the primary is wrapping up. He said after an initial fundraising push, the campaign would focus on a number of key states as it puts its general-election resources into play.