Republican National Committee Chairman Reince Priebus, speaking with Fox News' Greta Van Susteren, even acknowledged that the wall amendment was a "hat tip" to Trump.
But Bruce Ash, head of the RNC's rules-making committee and a member of the convention rules committee, said he is not certain that Kendal Unruh, a Colorado delegate leading the anti-Trump charge, has the support of 28 of the 112 member convention rules committee needed to pass a "minority" report and keep her effort alive.
The critics of presumptive GOP presidential nominee Donald Trump, however, promise a pitched battle over the course of the convention.
District 36 Republican delegate David Covey said will not be in the camp of switching votes.
"There's so much energy to do this", said Dane Waters, co-founder of Delegates Unbound, one group challenging the widely held conventional wisdom that GOP rules require almost all delegates to back a specific candidate, based on state primaries and caucuses.
Allied with other groups like Free the Delegates, they are facing a GOP establishment determined to prevent a toppling of the presumptive nominee - or any embarrassing, nationally televised showdowns during the four-day convention.
Underscoring that, the GOP rules committee - a bastion of establishment loyalists - on Tuesday formally proposed to renew rules that require delegates to back the candidate they are "bound" to.
U.S. Army Lt. General Michael Flynn
"I wouldn't condone it or participate in it or enable his actions in any way whatsoever", he said.
Every cycle, it seems, Mr. Haugland floats the misreading of the rules that delegates are not bound. And when Covey says he will not switch his vote, he means he will follow party rules.
That compared with 45 percent who supported Clinton and 35 percent who supported Trump in the five days to July 8. The full convention's two-thousand-72 delegates will vote on the platform next week.
Hodgson said Trump "espouses views that are antithetical to American values of freedom and democracy" and is dividing the country along race and class lines.
Court documents obtained by the wire service indicate Sam Nunberg has been accused by Trump of leaking confidential information to reporters in violation of his non-disclosure agreement.
"This is a matter of saving the party", Unruh said.