In case you missed it, you can watch the full video of this event below.
According to C-SPAN:
All current or likely Republican presidential candidates were invited to take part in a “Voters First Republican Presidential Forum” on the campus of St. Anselm College in Manchester, New Hampshire. This event was the first opportunity to hear all of the 2016 Republican presidential candidates on one stage. The candidates appeared one at a time, answering questions determined by the editors of the Union Leader based on the topics suggested by the public. Senators Cruz (R-TX), Paul (R-KY), and Rubio (R-FL) appeared via video link from Washington, D.C. Jack Heath moderated.