Presidents in both parties - from John F. Kennedy to Ronald Reagan - have known that our free-enterprise economy is the source of our middle-class prosperity.
                                                                                    
                                        
                                        
                                        
                                        
                                                                                
                                            
                                                
                                                    
                                                        Marco Rubio's response speech to Barack Obama's state of the union 2013 address, www.theguardian.com. February 13, 2013.