"This never happened before. I've done this several times. There was no committees. We always had sub-committees where we could go in and work on sections of the platform ... They didn't allow any amendments. They didn't allow any discussion. They rolled us. We spent thousands of dollars to be here. Everything they told us they were going to do isn't what happened. And I'm extremely disappointed we don't have the pro-life language ... I've been coming to these since 1992 and this is the first time we haven't had a pro-life platform. I've never been treated so badly."
Trump's problem is that he fully understands the hardline stance of most Republican activists on abortion is deeply unpopular with most Americans. He is also not anti-abortion himself. He was always on record as pro-choice until he decided to run for president in 2015 and wanted the evangelical vote.
The problem from Trump is how to run as essentially a pro-choice candidate while bragging that you were responsible for overturning Roe, and keep your rapid base happy at the same time.