It's really not that hard, Rudy
From the Associated Press, this regarding Rudy Giuliani and the FairTax:
"I think there are several tax deductions that are vital to our economy," Giuliani said. "This would not be a good time — I don't know if there would ever be a good time to do this — to advocate ending the home mortgage deduction. The home mortgage deduction is considered by many critical to the ability of people to buy a home and keep their home."If under the FairTax you're not paying any Federal income taxes to start with, Rudy, what are you going to take these deductions from?
He also said deductions for charitable contributions and state and local taxes were important tax breaks that the plan would eliminate. The plan calls for getting rid of the Internal Revenue Service and giving taxpayers a monthly rebate on taxes on purchases up to the poverty line.