If giving speeches filled with empty rhetoric were all that were required to be a great Senator, Marco Rubio would be qualified. As it is, this is about all Rubio is known for: Giving speeches. Speeches which aren't even of the quality equal to those of the motivational speaker roadshow circuit.
No, these are policy speeches Rubio preaches to a choir of only receptive audiences. Bad policy speeches, and Rubio spends nearly all of his time giving them.
Today's example was his "economic vision," but if you paid attention, you recognized that Rubio was really speaking of Mitt Romney's economic vision. The one that lost him the 2012 election.