HARRISBURG — In a move sure to rekindle speculation that he has higher political ambitions, Pennsylvania Gov. Ed Rendell has agreed to make a public appearance with New York Mayor Michael Bloomberg in Los Angeles on Saturday, Rendell's spokesman confirmed.

Democrat Rendell plans to join Bloomberg, an independent who is weighing a possible third-party bid for the White House, and California Gov. Arnold Schwarzenegger, a Republican, to discuss issues involving the public infrastructure. The location had not been made public Wednesday night.

Rendell's spokesman, Chuck Ardo, dismissed as "much ado about nothing" speculation that Rendell's participation signals his interest in becoming Bloomberg's prospective running mate. Rendell, a former two-term Philadelphia mayor, also has rejected that notion in the past.

"This has got to do with two governors' and (a) mayor's' concerns about infrastructure," Ardo said.

Bloomberg, 65, a billionaire who has previously been both a Republican and a Democrat, has been quietly polling and analyzing voting trends in every state as he contemplates launching a campaign.