As I recall, at the end of the 1976 primary process, Jimmy Carter had a plurality but not a majority of delegates selected. But then, various Democrats started putting support behind him, so that by the time of the convention, Carters nomination was not in doubt.
good resources:
Candidate events
https://www.eventbrite.com/d/usa/trump/?crt=regular&slat=37.0902&slng=-95.7129&sort=date&view=list
Green papers
http://www.thegreenpapers.com/P16/events.phtml?s=c&f=m
“As I recall, at the end of the 1976 primary process, Jimmy Carter had a plurality but not a majority of delegates selected. But then, various Democrats started putting support behind him, so that by the time of the convention, Carters nomination was not in doubt”
yep, that is best-case scenario for the NeverTrumps