VP Biden and candidate Ryan will have to tread carefully while defending top of ticket . Biden 's off-the-cuff remarks and Ryan 's inside baseball approach are their Achilles heels . Comment:
VP Biden and candidate Ryan will have to tread carefully while defending top of ticket . Biden 's off-the-cuff remarks and Ryan 's inside baseball approach are their Achilles heels . Biden is an experienced debater , while Ryan is a congressional veteran and budget expert .