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.
Source: 2016 Republican Candidates Voters First Forum | Video | C-SPAN.org