Officials from Ted Cruz's defunct presidential campaign are talking up the possibility of a coup at next month's Republican convention in Cleveland.

Bob Vander Plaats, a former national co-chair of Ted Cruz's presidential campaign, told NBC that "everything's got to be on the table" when it comes to exempting delegates from supporting Donald Trump at the convention.

On Tuesday, Cruz's New Jersey state director Steve Lonegan called for a "delegate revolt."

"I would love to see a revolt," he told CNN. "It's time for the Republican Party to get some backbone and stand up against this guy."

Steve Deace, a prominent conservative radio host and former member of Cruz's Iowa statewide leadership team, has called on the delegates to the GOP convention to "declare your independence."

"You can end this and it's on you to do so. The rules permit you to do so," Deace said addressing the delegates via his radio show. "You have a choice to make: You can suffer the wrath of Trump's cult now, or you can suffer the wrath of the American voter later."

Whether the anger and chatter about a coup among Cruz's ardent supporters materializes at the convention remains to be seen, but it appears to have gained steam following the fallout of Trump's racial invective directed at the presiding federal judge in a lawsuit regarding Trump University.

Trump's comments appeared to cause Wisconsin Gov. Scott Walker, who previously endorsed Cruz, to rethink his support for Trump. And Illinois Sen. Mark Kirk ditched the Trump train as well. It's unclear whether delegates to the convention will follow suit, but there appears to be a growing chorus of Cruz supporters hoping for a revolt.