CLEVELAND (AP) — Sen. Ted Cruz is refusing to condemn a rebellion against Donald Trump at the Republican National Convention as the fiery Texas conservative weighs his political future against the prospect of a national Republican embarrassment. Cruz's continued public silence, as his loyalists actively plotted to undermine Trump on Thursday, irked Trump allies and Republican leaders alike, all eager to avoid a public spectacle when the four-day gathering formally begins on Monday. Yet having accepted a speaking slot on the main stage, there are signs the 45-year-old senator is willing to cooperate with Trump's campaign — privately, at least — even as he works to sustain his popularity among anti-Trump conservatives. Trump offered Cruz a speaking slot earlier in the month, an attempt to unite a divided party, even after Cruz assailed Trump as a "pathological liar" and "a narcissist at a level I don't think this country has ever seen" during the presidential primary season. "Ted Cruz is going to come in as the de facto leader of the conservative movement — and probably have more delegates on the floor than any candidate, including Trump, that are truly committed to him," said Saul Anuzis, a Cruz loyalist and Republican delegate.