Youtube Republican Debate

The CNN/Youtube Republican Debate yesterday highlighted some themes that have often been mentioned throughout the course. We mentioned the flat tax in class, and one subject that came up was the national fair tax, first Huckabee mentioned it, then Uncle Sam asked a question about it. The fair tax plan is to eliminate the IRS and impose a national retail sales tax for all new goods and services. It gained a lot of support in 2005 when Neil Boortz and John Linder released The Fair Tax Book supporting the Fair Tax Act.
Federalism also came up in relation to abortion. Candidates were asked if, after Roe v. Wade were overturned, they would sign a bill banning all abortions. Giuliani and Romney were the only candidates to respond, but I'm interested in how Fred Thompson would have responded since he is both a vocal supporter of federalism and pro-life. I was disappointed in Romney for so easily abandoning federalism but meh he is a politician.
There are also suspicions that one interesting questioner was another Hillary plant, which seems odd since her husband was responsible for don't ask, don't tell.