Trump is in the lead, and on track to win it, so it shouldn’t be a big deal ... and it’s obvious other state parties will probably impose a similar requirement, so there’s no avoiding it.
BUT let Trump attach one condition - support only if the GOP doesn’t play any games with the delegates ... if they do that, then the pledge is void
How about another pledge that ALL of the candidates have to take - to support the nominee of the party, no matter who it is?