Former Florida Gov. Jeb Bush's three delegates at the Republican National Convention cost him and his campaign about $50 million each. 

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Bush, who ended his presidential campaign in February after a poor showing in the South Carolina primary, had only three delegates vote for him at the Republicans' nominating convention Tuesday. His campaign and super-PAC spent $46 million for each delegate, according to The Washington Post's Dave Weigel.

He was a favorite going into the primary season and had substantial financial backing from his family network, but he was unable to muster the enthusiasm his campaign needed.

Donald TrumpDonald TrumpBlinken holds first calls as Biden's secretary of State Senators discussing Trump censure resolution Dobbs: Republicans lost in 2020 because they 'forgot who was the true leader' MORE's attacks on Bush as “low energy” resonated with GOP voters and hurt the former Florida governor, who struggled to compete with the business mogul and GOP presidential nominee.

Bush has said he won't vote for either Trump or presumptive Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonEverytown urges Rep. Marjorie Taylor Greene to resign over newly uncovered remarks Marjorie Taylor Greene expressed support on Facebook for violence against Democrats McConnell last spoke to Trump on Dec. 15 MORE and has no plans to attend the Republican convention.