ALBANY  Resistance is emerging among Democratic officials against Caroline Kennedy as she pursues Hillary Rodham Clinton’s seat in the United States Senate, with Gov. David A. Paterson bristling over suggestions that her selection is inevitable, according to his advisers, and other leading Democrats concerned that she is too beholden to Mayor Michael R. Bloomberg.

The governor is frustrated and chagrined, the advisers said, because he believes that he extended Ms. Kennedy the chance to demonstrate her qualifications but that her operatives have exploited the opportunity to convey a sense that she is all but appointed already. He views this as an attempt to box him in, the advisers said.

“You have people going around saying, ‘Oh yeah, it’s a done deal,’ ” said one of the advisers, who requested anonymity because they were not authorized to speak publicly about the selection process and did not want to anger the governor. “The quickest way to not get something you want is to step into somebody’s face.”

The governor’s frustration follows reports last week that Kevin Sheekey, a top deputy to Mr. Bloomberg who has been advising Ms. Kennedy, had called a labor leader and told him that Ms. Kennedy was going to be senator, “so get on board now,” and that a member of Senator Edward M. Kennedy’s staff was helping Ms. Kennedy reach out to unions.