On Americas Newsroom, the Florida senator explains why hes very optimistic about taking states with big delegate counts.<br />Rubio Trump, Cruz underperformed on Super Tuesday.<br /><br />Sen. Marco Rubio, speaking to supporters in Miami, vowed to continue his campaign after a disappointing Super Tuesday, and launched several barbs at .<br />Super Tuesday delivered some super punchlines for GOP candidates still in the race. Here are some of the highlights from Donald Trump, Ted Cruz and Marco .
