executive of a state why is that person not better positioned than you are? >> the presidency of the united states is a unique office. it's not like being a senator or governor either. >> have you been in a position where you make tough calls. where do you get that strength where you'd be in those decisions all day long? >> it's true the presidency is not like being a u.s. senator but it's also like not being a governor. >> what do you consider your biggest legislative accomplishment? >> first, let me say the most important job of president is commander in chief. being president is not like being a senator, but it's not like being a governor either. >> that anti-marco rubio ad was run by the chris christie campaign ahead of this weekend's debate. they posted that ad on friday