“Could you post any copy of that contract you might have?”
All of the candidates signed the same pledge. All three remaining candidates have now repudiated the pledge for their respectively stated reasons. See:
278063135 RNC Loyalty Pledge
http://apps.npr.org/documents/document.html?id=2329583-278063135-rnc-loyalty-pledge
Pledge
I, [blank], affirm that if I do not win the 2016 Republican nomination for President of the United States I will endorse the 2016 Republican presidential nominee regardless of who it is.
I further pledge that I will not seek to run as an independent or write-in candidate nor will I seek or accept the nomination for president of any other party.
Candidate Signature Candidate Name
Witnessed by Chairman Reince Priebus Date
Cruz and Kasich are being coy about supporting the GOP nominee, Donald has repudiated the entire agreement and threatens going 3rd party.
Supporting each other is small potatoes compared to going 3rd party. In exchange for the candidates’ agreeing to abide with those 2 rules the Republican Party allows the candidate to represent the party in the nominating process for President. Contractually any candidate who breaks he agreement could have their delegates rejected at the convention.
Not so smart Donald.