CLEVELAND — Hours before he was scheduled to speak at the Republican National Convention, former presidential candidatedrew loud boos from his supporters at the mere mention of the GOP's nominee,

Cruz, who has not endorsed Trump despite accepting a speaking slot for the convention's Wednesday night session, chuckled and let the boos continue during a thank-you event for his delegates and supporters in Cleveland.

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While the crowd at the lakeside bar made their feelings clear about Trump, Cruz didn't offer any signal as to what he would say in his convention speech or whether he would endorse the billionaire businessman. Cruz former campaign manager Jeff Roe refused to answer repeated requests from reporters before the address to supporters on whether Cruz would make an endorsement.