Trump has cratered; a month ago, I'd tell you he had this shit locked up, but it's increasingly looking like he won't have the 1237 delegates he needs to secure the nomination on the first ballot at the convention, and that there now exists a willingness in the party to go through a "brokered" convention and give the nomination to someone else. I'm not sure who that someone is. It's nuts, Trump is losing due to shitty management (not knowing how to wrangle delegates at county/state conventions) and the narrowed field looks to finally slow his momentum enough to keep him away from the nomination.
All of this, of course, is good news for people who don't want to see a Republican president.