**US Republican Presidential Contenders Head to Crucial Debate **
The U.S. Republican presidential candidates are headed to a crucial debate late Thursday, with Florida Senator Marco Rubio and Texas Senator Ted Cruz looking to curb the electoral momentum for the front-runner, billionaire real estate mogul Donald Trump.
Over 1200 delegates are needed to win the nomination. Trump actually has only about 79 so far and so many people say it is already over? Super Tuesday will tell us more but perhaps a lot of the total primary season remains to determine the results.