Denver ? Kansas Gov. Kathleen Sebelius said Thursday it’s “quite flattering and a little surreal” to be mentioned as a potential running mate for Barack Obama, but she declined to say whether she would accept.

“The decision is his choice,” she said during a visit to Denver, where she will serve as co-chairwoman of the Democratic National Convention in August. “I’m sure he’ll make a great choice for the country.”

Obama has named three people – including Caroline Kennedy, daughter of the late President John F. Kennedy – to head his search for a running mate. Among others named as possible candidates are former Sens. John Edwards and Sam Nunn and Arizona Gov. Janet Napolitano.

Sebelius, a second-term governor of a predominantly Republican state, has endorsed Obama and campaigned for him in Ohio, where her father, John Gilligan, was governor from 1971 to 1975.

In Denver, Sebelius spoke to a breakfast hosted by the environmental legal group Earthjustice, saying she supports Obama’s proposal to commit $150 billion to alternative energy development.

“That’s the kind of commitment that will I think greatly accelerate our opportunity to shift from doing things the way we’ve always done them,” she said.

Sebelius said renewable energy will be a factor in the election nationwide and voiced skepticism about “clean coal technology.”

She said effective clean-coal technology is 10 to 15 years away and for the present is a “total myth.”

“What we know definitely is it doesn’t exist right now,” she said.