WASHINGTON (CNN) -- Former New York City Mayor Rudy Giuliani received a positive review Monday from the Club for Growth, a fiscally conservative political action committee best known for its anti-tax positions.

"In a city long accustomed to high taxes and ballooning budgets, Rudy Giuliani successfully cut taxes; kept spending below the growth of inflation and population; instituted sweeping welfare reform; privatized and deregulated many aspects of the city's bulky bureaucracy; and fought aggressively for school choice," Club for Growth President Pat Toomey said in a statement.

But Toomey said Giuliani's record "is not perfect," and added the former New York City Mayor needs to "flesh out his positions on a number of federal issues."

Mike DuHaime, Giuliani's campaign manager, said in a statement that the Club for Growth's report is "further evidence that Mayor Giuliani is the strongest fiscal conservative in this race with the proven record to back it up."

The conservative group's positive assessment comes as Giuliani's more liberal position on abortion rights has come under scrutiny by some social conservatives.