In a nutshell Rumsfeld's plan was attacking Iraq with 40,000 troops roughly an Armored Division reinforced .... Frank's first submitted plan was for 380,000+ soldiers ... a Desert Storm II and Rumsfeld "vetoed" it.
Rumsfeld did not give Franks a blank check .... Rumsfeld was a roadblock.
Why not read Franks American Soldier to get a firsthand account of what happened?
"Franks defends his policies, quite at odds with the first Desert Storm / Colin Powell doctrine of using overwhelming force, describing the fall of Baghdad as only having been unexpected by cable news networks such as Al-Jazeera and CNN; the smaller force made his tactical movements far easier to accomplish. "