By Victoria Cavaliere and Jonathan Allen
NEW YORK, Feb 1 (Reuters) - New Jersey Governor Chris Christie was greeted with audible boos and a few loud cheers during a Super Bowl-related appearance in New York City on Saturday, a day after a former appointee said the popular Republican knew about politically motivated lane closures near a busy commuter bridge.
The incident cast a cloud over Christie at what could have been a moment of triumph for the man considered a leading candidate for his party's nomination to run for president in 2016. The Super Bowl will be played on Sunday in East Rutherford, New Jersey.
At a ceremony marking the hand off of Super Bowl hosting duties, Christie appeared Saturday in New York's Times Square with NFL officials and political leaders from New York and Arizona, which will host next year's game.
Christie's introduction was met with a chorus of audible boos and chants of support from the thousands of people gathered in the area for a Super Bowl street fair.
He did not mention the scandal during brief 30 second remarks in which he thanked the NFL and his New York counterpart and Super Bowl co-host, Governor Andrew Cuomo.
The negative public sentiment was unusual for Christie, the chairman of the Republican Governors Association who coasted to re-election as governor in November with 60 percent of the vote.
But in the weeks since starting his second term, Christie has been dogged by scandal since it emerged last month that some of his aides and appointees orchestrated traffic jams around the George Washington Bridge in Fort Lee, New Jersey. State and federal investigations have been launched into the lane closures in September, which came after the town's Democratic mayor declined to endorse the governor's re-election bid.
Christie has adamantly denied any knowledge of the lane closures and cut ties with two of his top advisers for their apparent role in the scheme.
David Wildstein, a long-time Christie acquaintance and one of his appointees at the Port Authority of New York and New Jersey, which managed the bridge, resigned from his post after it emerged he oversaw the closures.
On Friday, an attorney for Wildstein said "evidence exists" Christie knew of the closures when they were happening. The letter did not indicate Christie involved himself in the closures in any way, did not specify exactly when he became aware of the jams and offered no evidence to back up the claim.
Christie's office denied the claims and issued an email saying: "David Wildstein will do and say anything to save David Wildstein." The email to Christie's friends and supporters was posted on the website Politico.com and confirmed by Colin Reed, a spokesman for the governor.
The governor's popularity has also been tarnished by his use of Superstorm Sandy relief money for a tourism ad campaign. The mayor of Hoboken, New Jersey, has alleged that her hesitance to back a real estate deal prompted Christie's office to delay Sandy relief money.
"ON THE BRINK OF RUIN"
On Saturday, local newspapers said the governor's political career could be doomed if it was proven he knew in advance of the four days of lane closures that caused massive delays for commuters, ambulances and school buses.
The New York Daily News said in an editorial that Christie now "stands on the brink of ruin" if he cannot defend himself against the latest claims.
"In that event, Christie's governorship is over and he should prepare to face a federal criminal probe as a private citizen. Resignation would be a must. Otherwise, impeachment would be a snap," it said.
Charles Stile, a columnist for the Bergen Record, a major New Jersey newspaper, wrote on Saturday that if Wildstein produces evidence that "turns out to be the damning, incontrovertible kind, then Christie's career will be in tatters, if not over."
The allegations made through his attorney by Wildstein, who has been subpoenaed in connection with lane closure probe, said the resigned Port Authority official could "prove the inaccuracy" of some of Christie's denials.
The letter describes the order to close the lanes as coming from "the Christie administration," but does not say that Christie himself orchestrated the closures in any way.
On Friday, the Christie administration said Wildstein had said nothing to contradict Christie's position that the governor had "no prior knowledge" of the closures.
A bipartisan committee of state lawmakers is investigating the episode, as is the office of Paul Fishman, the U.S. Attorney for New Jersey.
Hours after Wildstein's letter was released, Christie appeared in Manhattan to attend a birthday party for the broadcaster Howard Stern, but avoided the reporters assembled outside.