New York Times writer Danny Hakim reports that Rudy Giuliani has decided not to run for Governor of New York.

Former Mayor Rudolph W. Giuliani has decided not to run for governor next year after months of considering a candidacy, according to people who have been told of the decision.

Many Republican leaders had viewed Mr. Giuliani as the strongest potential candidate as voter anger and anti-Albany sentiment have appeared to be swelling.

It remains unclear whether the former mayor is considering any other political race in 2010. Some have urged him to take on Senator Kirsten E. Gillibrand, who is newly installed in office, has never run statewide and is still introducing herself to voters in some areas. Mr. Giuliani is said to have made no decision about such a race. …

It was not clear what prompted the decision, but the possibility of facing Attorney General Andrew M. Cuomo, who is quietly planning a run for governor on the Democratic ticket, may not have appealed to Mr. Giuliani, who suffered a bruising defeat in the 2008 Republican presidential primary.