Ted Cruz refused to endorse GOP presidential nominee Donald Trump on day three of the Republican National Convention Wednesday night, prompting many audience members to boo the Texas senator and chant "We want Trump!"

"If you love our country and love your children as much as I know that you do, stand and speak and vote your conscience," Cruz declared. "Vote for candidates up and down the ticket who you trust to defend our freedom and to be faithful to the constitution."

Cruz's "vote your conscience" line echoes the #NeverTrump campaign's call for delegates to "vote their conscience," rather than for the controversial businessman and reality TV star-turned-politician.

Online reaction to the Texas senator's speech was mixed: 

Donald Trump, for his part, said afterwards that he knew Cruz was not going to endorse him, but decided to let the speech happen regardless.