Super Tuesday is the biggest single day of the state-by-state presidential nominating contests for the November 8 election.
Businessman Donald Trump has defied all expectations with his sweeping win on Tuesday and in previous primary contents.
He has made campaign pledges to build a wall along the US southern border with Mexico and deport 11 million undocumented immigrants.
He has also proposed banning Muslims from entering the United States.
READ MORE: Donald Trump and the 'populist insurgency'
With his recent victories, Trump is likely to advance towards sealing the Republican nomination though he still faces a tough fight from Florida Senator Marco Rubio and Texas Senator Ted Cruz.
Many are now saying his nomination is inevitable.
So, what would such a scenario mean for the Republican Party? And how much support does Trump really have among the US electorate?
Presenter: Martine Dennis
Melissa Michelson - Professor of Political Science at Menlo College, California.
Joe Watkins - Former White House aide under President George HW Bush.
Simon Maloy - Political writer for Salon.com
Source: Al Jazeera