Des Moines, Iowa (CNN) - A Republican close to Chris Christie says the pressure is intensifying on him to join the presidential race but insists that the New Jersey governor's mind has not changed.
"I think that anybody could change their mind, but I don't see any evidence of that," the source told CNN Wednesday. "They continue to be pestering him and urging him to run."
The source said the pressure on Christie "ratcheted up" on the aftermath of the Ames, Iowa Straw Poll, which effectively forced former Minnesota Gov. Tim Pawlenty out of the race.
And in a sign of the campaign's ongoing fluidity, Texas Gov. Rick Perry has dominated coverage of the GOP nomination battle after just five days in the race.
Rumors about Christie and Wisconsin Rep. Paul Ryan spiked in the days after the straw poll, as establishment Republicans and donors continue to search for a candidate who can not only win the GOP nomination but defeat President Barack Obama in 2012.
Reports surfaced Wednesday about focus groups being conducted on Christie's behalf ahead of a possible presidential bid. Two sources denied that and said the governor's top political advisers are currently on vacation.
Christie adviser Mike DuHaime also issued a flat on-the-record denial about the focus story: "The report is untrue," he said.
"I know he is getting a ton of calls and the pressure is ratcheting up, but as far as I know, his head is still where it's always been," one of the sources told CNN.
– CNN Deputy Political Director Paul Steinhauser contributed to this story.