(By msnbc's Joe Scarborough)Each presidential debate has its defining moments. So many Republicans are breaking through and speaking to their specific audiences. Tommy Thompson, Mike Huckabee, Jim Gilmore and Sam Brownback are having good moments. Mitt Romney looks like he owns the stage. But Rudy is having none of those breakthrough answers. Why? Who knows. But that leadership style we saw on the streets of New York after 9/11 is not translating on stage at the Reagan library.